How to choose username in Bluesky social app?

hey there how to choose username in Blue Sky app so you need to tap create new account and then in the bottom you have your username so yeah and then you can just reserve some cool username at like John at Blue Sky social it's a really good time right now to get that amazing handle in case this app really takes off in future but the weird thing is that you need to have invite code and it's pretty hard to get one there is very small amount of of testers so can you refer people I don't know um so yeah but that's how you can choose your username and just if you have the possibility I'm happy for you maybe you can just resolve your first name username handle