Hate to break it to you, I think the best option is once you have CGs, more content to show then set up a patreon and show it to peeps, instead of "Hey! I'm going to make a new game from scratch and set up a patreon". I don't think you will get lots of patrons here.
It's good to be honest but putting "im not even sure how to even fix that" would give a heart attack to patrons.(because this shows inexperience, if you're really unsure how to fix a problem try to go RPG maker forums).
You should just put "I'll take a look at it"
Sorry if I'm nagging too much, but just wanna state that