I'm also using this jam to learn Godot.
Back in school a friend and I did a jam to learn Gamemaker. We tried to make something wayyy too complicated and it ended up being a terrible game (a roguelike with random level generation and multiple bossfights). However, we did learn really quickly!
I think it's easier to learn if you have a clear goal with limited scope.
Hoping this time goes a bit better! I'm sure we'll have fun regardless :)