Which client app/website are you using? You can install a simple LN wallet on your phone (like Blink, Wallet of Satoshi etc) and add the LN address to your nostr ID.
Discussion
Okay, I understand that makes perfect sense in your mind and it’s probably super simple and easy… but I don’t even know what an LN is and it feels like trying to figure out what a bunch of extraterrestrials are saying, lol. But thank you!
I’m on Primal desktop and Damus.
Oh okay...I don't know about Damus btw, I thought you are an android user like me... 😁
Btw Primal itself has a build-in wallet (at east on my Primal Android app). So it's pretty simple for me.
LN means Lightning Network. It's like Apple Pay, a method of easy and fast Bitcoin transactions, mostly used for small amount transactions.
I have an Android, too! You were right. It was super easy to set up. The only problem is that the setup has a bug. At the end, the app emails me an activation code but there's no place to enter the code, won't allow me to finish the setup, and the email doesn't contain an activation link.
I tried to sign up separately with Strike, as ThatDudeLuke@lifeinmi.com recommended (also super easy) but it requires a non-Google phone number, which I don't have (I never use the phone.) I finally gave up but the built-in Primal Wallet is for sure the most user-friendly, if it only worked, haha!
For example, this is my LN address from Blink wallet app on my phone: pallabjd@blink.sv
It's an Bitcoin Lightning wallet. 
And I just add this LN address to my ID on Primal, by editing the profile. That's it. 
When somebody zaps me, sats directly goes to my Blink wallet.