Ralf there are a ton of considerations whether or not to patent. Patents give you some protection against your idea being stolen my someone else. More and more, patents are also used defensively -- in a crowded market where many companies have similar ideas, patents are used to deter others from suing you from infringing on their patents (because you can probably sue back using your patents). Patent detente.
When considering a new product invention, it's always a good procedure to search for existing patents, because you don't want to get caught infringing on other people's patents.
Unfortunately, from the little I know about your idea, it looks like there are already many existing products (and patents) for similar ideas. If it's solely for work, you might be better off just buying one of the similar products.
You can still patent an invention if it is a improvement over an existing patent. On the flip side, you may need to license and pay royalties to holders of existing patents -- if they allow you to license their invention at all.
In general, if you have a new product idea, then you should work on creating a prototype. If the invention is outside your area of expertise, then you can either partner with someone or hire a company to develop the prototype for you. At the same time, you should work with a patent specialist to see whether you can patent the invention (and/or if you will be infringing on other people's patents).
In some jurisdictions, you can file what is called a "provisional patent". It is a simplified filing to get your patent an early "priority date" on file. However patent laws are complex and a specialist from your area would be able to advise you on the best way to proceed.
Patents aside, the process of bringing a new product to market can be bewildering. It takes a lot of time & effort (and money), not just perfecting the invention but on legal, marketing, sales, support, manufacturing, etc. You might be interested to take one of the many free entrepreneurship courses being offered from sites like Coursera or EdX.
You are actually lucky being from the Netherlands -- your country is one of the centers for entrepreneurship, and there are a lot government and private sector resources from which you can draw on. Even though I am in Canada I have many friends and business colleagues from the Netherlands. (I can ask them about Dutch startup resources if you'd like).
One of the best ways in thinking about a new product and entrepreneurship is to surround yourself with others with the same mindset. Maybe there are local meetups for startups, etc. Even if this particular idea is not patentable, maybe you will come up with other inventions in the future.