Godot is much easier than you think, there is literally a method called "move_and_slide" which will handle...moving and sliding ^^
And there is even a method called "move_and_collide" and you can probably guess what it does.
Also, the language, GDScript is indent based, which makes it quite visual.
The easiest way to get started is by doing one of the simplest scene only using physic based nodes, so you can get to know the UI side of it. Then, you can add some code.
You may find it much easier than you thought that it was.
GBStudio is nice, because it allows to create...GB games, which requires quite some level coding and GB studio makes it visual. So, there is no competition between Godot and GBStudio.