Good luck! I think you've got a solid skill set already, so your chances are better than average; but yeah don't underestimate marketing, I'm sure you've seen how many indies have an okay game and don't get even 10 reviews.
I'd offer help but I don't have actually sound design experience yet, and don't think I would be quickly good at it. But Kenney is working on a sound design tool that will hopefully release soon, that looked pretty simple & powerful... well anyway, plenty of audio related talent around.
I have, as we all do, dozens of potential projects written down. Currently working on a minimalistic clicker multi-mini-game, mostly so that Google doesn't close my Android developer account again. In the background working on a large-scale detailed town simulation text/GUI game (drawf fortress but less combat and more mundane human life), and also Bevy game jam starts this weekend so I'll to join.
BTW how many hours have your poured into this game so far? Ballpark?
