Hi. I hope I am not too late and my response may be useful.
A thing you can do is not start with your game right away, first, you could just watch one 'beginner' tutorial of the engine you want and then create one or two simple games, not to publish, (so it has not need to be polished) but just to practice. Then, if you need, just search for tutorial of how to do X or Y thing in that engine. There is no tutorial that covers absolutely all (well there may be, but probably are two hours long). Many things in game dev (like any other software development) is searching for info and solving problems.
Also, since you mentioned you tried to use RPG Maker, perhaps other RPG like creators might help? Like rpg paper maker or rpg tools.? Depending the game you wan to create, sometimes using a 'genre specific' engine can be more beneficial than a 'general' one. But if you want to create a variety of genres in the future,ignore what i just said.
Good luck.