It's important to populate your profile with photos in order to be discoverable and get traction on the app.
You can add or change your Profile image by going to your Station. Tap the "My Profile" button, then interact with your profile image by tapping the blue plus button on your avatar.
Tap the camera icon on your station to add a background image.
Make sure to add a Feature image to your profile. The Featured Image will show up behind your broadcaster card in Radio Mode when you broadcast.