My experience of linking a wallet to nostr was a little more complicated than just setting up a non-custodial wallet.

It seems that it needs to be a custodial lightning wallet that is NWC-compatible, and you need to have inbound/outbound liquidity.

It sounds technical already, but I'm not especially technically-minded, and was still able to get it set up after a few false starts and research and retries.

I got mine set up through Rizful (dotcom), but this is probably NOT the best, it's just the first one I came across that seemed doable for me, and I got it done.

I've heard quite a few people mention Alby and AlbyHub, but I don't know if that's harder or easier than Rizful. I hope this helps!