From what little knowledge I have of Godot here's a few things that are nice to know:
- Signals are very handy
- Singletons are tucked away in the project settings, under 'Autoload' (along with input, windows size etc.)
- Documentation is pretty good
Some nice resources:
- Godot Shaders will likely save you some time
- Godot Asset Library is evergrowing,
- Collection of Open Source Games made in godot, some are made in older versions. I know it helped me a fair bit to see how people structure their projects.
Life is keeping real busy right now so I likely won't be joining. Have fun with jamming everyone.