Might be better to get a new node since you’re especially if you want to receive payment. You should look at nostr:npub1aghreq2dpz3h3799hrawev5gf5zc2kt4ch9ykhp9utt0jd3gdu2qtlmhct or nostr:npub126ntw5mnermmj0znhjhgdk8lh2af72sm8qfzq48umdlnhaj9kuns3le9ll they both have servers that’ll do what you want plus are vastly superior to a raspberry pi