You either do a sole proprietoryship, or a full blown incorporation or corporation (I'm honestly not sure what the difference is between the two).
There are sole proprietorships and partnerships, where you're basically just registering a trade name so a bank will open a bank account in the name of your company (say, "Red's Hot Dog Stand") but the company's accounting and taxes are filed as part of your personal taxes (or the two or more people if it is a partnership) but provide no financial liability protection for the parntners or sole proprietor like a corporation does for the shareholders (owners).
(I'm honestly not sure what the difference is between the two) From my understanding both inc and corp require you to have a board of directors, issue shares, etc...
For provinces that use a form of the Business Corporations Act rather than the older Companies Act (probably all of them now? BC was one of the last to still use the Companies Act and they changed like 15-20 years ago) you're allowed to whichever choice of the three suffixes Limited, Incorporated or Corporation or you may choose to use the abbreviation LTD. , INC. or CORP. and whatever you choose becomes the full legal name of your corporation (eg. Red's Hot Dog Stand Inc.) when you register it. You can't then change and use a different suffix without doing a name change procedure and paying the filing fee for that, but there is no legal difference between the three suffixes allowed.
so it's a pretty huge deal to manage and you basically need a team of people to fill all those roles.
No, it's not. I own several corporations and I'm the only person on any of them. I "wear multiple hats", as it were, holding all the required roles myself, but that's not difficult, as you really only need three roles filled. President, Secretary and Treasurer. Often the Secretary and Treasurer roles are held by the same person, even in multi-person corporations, simply holding the title of Secretary-Treasurer.
So, yeah, I am the President, the Secretary-Treasurer, and I'm the sole Director (there can theoretically be up to 15 directors) as well as the only Shareholder (there can be an unlimited number of shareholders, they're the ones who actually OWN the corporation) so I own 100% of my corporation.
There's also lot of paperwork involved and the government site does not really explain in much details
It is a single page, I just filed the Annual Return for one of mine, "Saturn Computer Technologies Inc." the other day when I went into the registry (basically a privatized DMV shop here) and renewed the registration on the company van and truck. It is a simple form where you basically say if there have been any changes in directors this year (No) and list the largest 10 shareholders (so, drussell with 100%) and you pay the $80 (used to be $25 for many years) and you're good for another year. If you forget to file for two years, your corporation will be "struck" from the registry of corporations and you would have to go through the Revival procedure and pay a revival fee as well as filing all the missing Annual Returns. (Currently ends up costing about $600.) Obviously you need to also file a corporate tax return with CCRA, but to actually keep the corporation alive and in good standing, you just need to file the "Annual Return" with the province.
so you almost need an accountant or lawyer or something to figure it all out for you. Like you need to "file" once a year, and you need to have special meetings with minutes, so I imagine that has a certain format that is required too. It's quite involved.
It's actually very simple if you have the right structure from the start. My father formed hundreds of thousands of corporations for people here in Alberta from the early '80s right up until his death, starting when the AB government first privatized the "Name Search" procedure and he decided to become one of the first Search Houses, thinking it would be a good way to build up some additional accounting business (he was a CA, Chartered Accountant) to his fledgling accounting business. The searches and corporation forming, as well as stocking numbered "shelf companies" that were pre-incorporated, ready to transfer to someone (without waiting what sometimes used to take weeks to actually have filed with the government and get back) became such a huge business that he soon gave up the actual accounting to instead just help people like you form their corporations.
He enjoyed having people come in, explain their particular situation (wow, some people had some crazy business ideas over the years, made for great dinner conversation many nights when we were kids

) and get them set up in the best way possible for maximum tax savings, etc. (like pay your wife a bit to be "secretary-treasurer" to help split income for lower tax,) with his accounting background. Your yearly shareholder meeting can be a good excuse for the corporation to pay for a night out at a restaurant where you hold your "meeting" to essentially resolve that everything stay the same as last year.

I looked into it as I was thinking it would be cool to start a corporation in case I decide to monetize a hobby, and it would also act as a way to write off living expenses.
That's actually a great idea. I started my first company (the Saturn Computer one) when I wasn't even old enough to be a director yet (must be 18) so my dad was the original director, but I was the President, Secretary-Treasurer and 100% shareholder.

Like if I make my house owned by the corporation and charge myself rent, I could write off all the utility bills etc. But yeah it's quite involved and I don't even know if that would be legal.
You'd certainly want to talk to an accountant before trying any shenanigans like that.

If your owned a SECOND house and you were renting it out that would be fine, many rental properties are owned by corporations, but trying to "write off" 100% of your primary residence would throw up red flags at every turn with CCRA. You can deduct a
portion of your mortgage, utility bills, etc. if you operate at least part of your business from home, but the rules are that it is supposed to be the proportional to the portion of the house that is actually used for the business. If you have one room that you use as a home office, you could reasonably deduct 10%, for example. They generally won't hassle you if you say it is up to about 33%, but if you try to say it is 50% or something, they're going to want justification and proof. You might still get away with that if you're using your whole basement and garage for your enterprise or something, but they're gonna ask questions.