Hello guys, I want to begin developing games (preferably on Godot). I am currently working as Backend Software Engineer using Java, so I had a pretty clear base on programming. Can you recommend me a good site to learn GODOT? Maybe you also know some good communities for learning this game engine. Thank you!

if java is your thing try an older version of unity

Probably just start with the Godot Docs.  Last I checked there are some beginner tutorials in there.