Welcome to the class @abaz! Your sign looks great. For being an extreme beginner, you should be proud of your model. I only have 2 notes to offer:
- Fix faceting by smoothing normals and hardening specific edges. There’s one spot in particular that has a lot of faceting:
I recommend following this part of the treasure chest course that shows how to smooth these facets while maintaining hard edges where desired.
- Vertical posts are plain. It would be great if you added bevels, wood splits, and un-straightened the edges to match the horizontal planks.
Overall this is great work for being a beginner! It’s a B+ in my book. Keep it up! 👍
As for the UI weirdness, you could try “resetting” you Blender UI by:
- Saving your file
- Loading a new (blank) blender scene with File > New > General
- Then open the scene you saved but unchecking the “Load UI” option in the bottom left of the file browser:

The idea is to load your scene within a fresh default Blender UI.