I would write a Nostr Delivery app and a Nostr Marketplace app and apps to help people get out of legacy system. I have already studied Nostr and implemented some simpler libraries and apps, so I would continue what I'm doing. https://github.com/antonioconselheiro/
Nostr Delivery could be tree apps: (1) food delivery, (2) take a ride, (3) send packages as mail. They would use similar architectural structures, using open street maps and similar tracking Nostr events (maybe userstauses event kind with g tag), all write in angular and typescript and build with cordova.
Delivery app based on nostr? That is a good idea 🤙
I'm building apps that contain the smaller pieces of code that I will use to implement this larger application, this is what I can do without funding and without a team