Well, to give you some ideas, the first step I'd do is do the thing I said in my review from a couple pages ago and turn it into a straight VN, removing the life sim parts. That makes the content, of which there is a huge amount by now, many hours, much more easily accessible to any person who just gets a link and downloads it (No walkthrough, no confused event flagging etc) maybe also rework the initial couple minutes, just so your game makes a good impression until you "hook" them. I know the first couple minutes of the game made quite a bad impression with me, only to redeem itself later (When presumably your "game making skill" already had increased)
And when you've done that, ideally when the next time you're batch rendering, just spend while a on the various imageboards and forums, introducing the game to more people, Q&Aing for a bit, gathering feedback, and hoping the strength of the product itself and word of mouth gets you new patreon supporters. You have a good amount of $$ per supporter, all you need is more supporters, and you get them with more people who freely shill for your game because they think it's good.
But that's just me who hasn't made a game and doesn't have a patreon and doesn't know jack shit in general.