Hey! Easiest way is to download an app called wallet of Satoshi.
Click on receive, then copy this option (see the screenshot).
Then you can go into your profile page (same place where you set up your profile pic. Paste the what you copied into the lnurl field!
The lightning tips field, my bad lol 
Hey #[2] thank you so much!
Ask as many questions as needed if you still need help 🖖
1) How do I change my banner image using my phone?
2) Is there an option to make my account private?
3) How can I become a Damus contributor?
1) upload the image you want to have as your banner to a service like nostr.build, copy the url and paste it on the corresponding profile section.
2) I don’t think so
3) I would start here: https://github.com/damus-io/damus. You can also get in touch with Damus devs, like #[4]
