Well, the jam nowhere near a full two weeks long so if you’ve misread the dates that’s maybe a slight red flag with your plan.
I came to Godot from Unity and would say learning GDScript is very easy and intuitive if you’re already a coder, but how to “think” in Godot takes a bit more time as it has quite a different way of structuring things.
That said there’s no reason you couldn’t complete something but I’d advise making it very small so the new way of doing things doesn’t completely derail you. Or, of course, just being ok with the possibility of not finishing, that’s a good way to go into a jam regardless :D