My advice is, don't make a Markiplier fan-game as your first game. Read tutorials, follow them, understand them, then make a game for the sake of making the game. Do not make your first game be your masterpiece, or what you want. Learn the program, know it, understand it, then when you are at a point where you can make a decent game, regardless of if it's a fan-game or not, then make the game you want.
There are so many wanna-be game makers who literally slap any tiles and music and 'uber awesome skillz™' and try to pass it off as halfway decent, that RPG Maker itself has become synonymous in some circles as 'that program that makes a lot of ****ty games'. I don't care if it's a fan-game or your masterpiece, if you don't take the time to understand the program, to learn it and breathe it, people will try it, hate it, and give you excessively scathing reviews.
That is what you must do first. This is what you must must absolutely must do before you work on your fangame.