Make something people need everyday. Start small...

Reuse your analyst skills and provide some useful data calculations or aggregations with mobile apps. Reuse you new font-end skills with React Native, Apache Cordova etc.

Mobile app stores handle a lot of hassle like distribution and billing. I would avoid complex backend at all cost if you don't want to be on 24/7 devops duty. Maybe periodically updated CVS at basic webhosting would be enough.

Some basic resources https://www.indiehackers.com/post/what-are-the-most-indispen... and IndieHackers community in general.