Participated in 2022 Linux Game Jam with Cat Street, it was my first game & jam and haven't been updated for a year.
What I've learnt by joining this jam:
1. Better to prototype a 3D game in Godot using CSG nodes + grid textures
2. Multi-player games are way more fun
3. A little knowlege about V-Sync, taught by the mentors of this jam
4. No matter how crappy your game is, make and submit it, you 2nd game will be always better than that :)