No shortage of great suggestions here. Lotsa knowledge pouring in!

So I'm there with you although not quite as extensive.

May I suggestion: mobile app? I'm just now trying to get into PWA using vue. I have quite few mobile ideas and trying to pick your fav child is hard ;-) But using a bit of Biz Intel, research is pointing me to certain direction.

Also why not make it side hustle? Check out indiehackers.com (I have no affiliation). Great motivation and inspiration.