create an alby or wallet of Satoshi account and save it to your profile

it will look like an email rizzo@getalby.com or something like that

I use Alby. It’s also possible to connect it with your own node. Sadly they don’t have a mobile UI, but I connected it to Blue Wallet for that. Wallet of Satoshi is the easiest imo. You can also use it only for receiving sats and some other wallet for storing & sending.