You're being way too ambitious. First dedicate yourself to learning how to use the engine, and how to make games in general. To give you an idea, I'm pretty much an expert at this, and it still takes a few yottagrams of work to do something good. Often because Godot is a pain to work with (Unity is easier, but I'd have to pay if I get a ton of money), but mostly because it's just a really complex thing. You have to actually design the game, you know. Design gameplay, design levels, design and draw characters (maybe you got that covered?), code, write a lot of music, write a good story. Also remember you're talking about an adventure that lasts tens of hours.
More importantly, here's a tip. Your first idea is always the worst one. You want to do a Stick of Truth clone; is that all? Why would anyone buy it if it's just a clone? Does it have anything special? But note that "Stick of Truth but with X feature!" isn't very attractive either. Why don't you come up with an original idea? And start with a smaller game! Like, a really, really small game. If you're totally inexperienced with making games, an enormous game like that is way out of the question.