I’m sure the start9 will be handy for that 

 Citrine on Android

If on desktop or iOS, connect to your own relay. 

All relays you have added to your client(s) store all your npub metadata  

 Thanks! The rabbit hole begins.  

 Yea because I barely understand any of this yet 

 Run your own relay. If you're on Android, i think Citrine can handle this right on your phone. Or you can run a relay on your own hardware or vps