I also think onboarding in general is a key point, in fact I am working on it for Nostr.
I will check out your project!
Interesting question.
For me onboarding pre-nostra people is key also for ecash adoption.
I've made the prototype I was talking about last month..
Feedback most welcome. Nothing about ecash YET.
https://github.com/ildella/noa
zapstore://tools.frankie.nostr.noa
Discussion
Let's talk. I'm over stretched :)