I have installed @desofy on iOS and here is some feedback.

The onboarding flow worked as designed. I did not have any difficulty.

One suggestion... have different pathways for different users (creators, casual users, crypto-maxis) to provide appropriate context and plant seeds of expectations.

Another suggestion... some help text around picking username. Some social communities thrive on real names (facebk), others work fine with seemingly random names (reddit). A new user will experience some anxiety at this point in the process, and providing some text could ease that friction.