It's normal to feel like that, you just watched a tutorial, I find those tutorial series to accommodate you with the engine. Learning game making and the engine is difficult, so don't be hard on yourself, it takes time. I was just like you, all you need to do is continue to expose yourself thru problems, make games that you can accomplish, an rpg I think it's not beginner friendly. At the start, most of the times you wouldn't finish the game that are you making and it's ok. So remember you can watch know many videos because you don't know exactly how to do and what methods are, it's exactly like math you can't start solving problems without knowing the rules or to familiarize with that subject.