SKI on Nostr: primal is a good starter. It has a 1M sat maximum though. I would then check out ...
primal (npub12vk…pugg) is a good starter. It has a 1M sat maximum though. I would then check out npub1cvqlzvmjercdn0ypsmv8f7j9lge6ahsnueh5rparh53wuswftv4q49yjt3 (npub1cvq…yjt3) with a Coinkite (npub12ct…c5ky) tapsigner.