First PCB - how does it look?

[LooseJunkHater]

PCB view (no traces on the underside):
Schematic:
Main IC: MP5035 https://www.monolithicpower.com/en/mp5035.html

Holes labelled STP* (small holes) are TestPoint_THTPad_D1.5mm_Drill0.7mm. Holes labelled BTP* (big holes) are TestPoint:TestPoint_THTPad_D3.0mm_Drill1.5mm. The trace sizes are 3mm and 0.6mm.

I purposely went with through-holes for increased durability (if I need to perform bodges/mods). I also obviously have not yet laid the ground plane yet.

Feedback? Thanks.

[ataradov]

There is no ground pour. All your components are just hanging in the air. EDIT: I see your comment about the ground. Well, the ground is basically the most important part with voltage regulators and similar power-related devices.
 
Instead of those pointlessly thick traces, move capacitors as close to the IC pins as possible.

The datasheet has recommended PCB layout. Yours is not even close.

[JustMeHere]

I'd suggest a barrel jack or pin header for your VIn.  And a pinhead for your Vout.  You definitely want at least 2 GND connectors.  One for your power in and one for your power out.  Think: how do I want to connect this?

And for your fuse, consider a PTC.

Since it looks like you got everything on one side, use the botton for your ground plane.  A ground plane should only.have holes through it.  No slots.  If you add it to the top then you will have slots.  Probably not a big deal in this design, but just stay away from a slotted up ground plane.

[Shell Albert]

great job!  your first PCB project is much more beautiful than mine, couples of years ago. More PCB layout you do, more better it will be. I sincerely accept other experts suggestions, but I insist on reducing complex, like if there's no GND connecting terminals, I would solder two wires together, it won't be a problem.