The good news for you: I've read every different push notification service/auth provider/etc's documentation and made informed choices, so you don't have to!
I've made HyperFast (https://hyperfa.st), a service which includes:
- A boilerplate to get you up and running (hyper) fast
- Solid documentation that tells guides you along the various steps with developing, building, submitting and launching an app
- Detailed documentation on the ins-and-outs of the Google Play Store and iOS App Store
- (a big one) lots of advice on MVP app principles, how to not overthink it, what information to put on various screens, things like that
- (another big one) very opinionated advice on services to use, UX paths to go down and decisions made for you so you don't get bogged down in swathes of documentation
- A community of developers on a similar app-building path to help you out whenever you need (including me, currently at your beck and call during Australian awake hours!)
My promise is: buying HyperFast will save you - at the VERY least - your hourly rate x the hours you'd spend setting up a React Native app from scratch.
The service is in its infancy at the moment so I'm offering a hefty discount for new signups. Would love for you to check it out and would love some feedback.