My firsty 3D job. Advice needed

Hello guys!
Started with 3D 6 months ago, this is my first 3D job, or to be a more precise testing task for it.
The goal is to create a small house for a mobile game: 1800 tris max, with textures 512x512.
Right now its 1100 tris and still have some free space on maps for some details like nails and so on. The design doesn’t matter, what matters is the quality of textures, UV layout, and topology.

Textures are 512x512 right now, but I think that I did it wrong…isn’t it better to make them higher resolution and then downscale them? Right now it’s not too late to rebake normal and AO maps.
Will be grateful for any sort of feedback!
THANK YOU!

![UV_FINAL|500x500]