You don’t even need a hardware wallet to start. You can store it on your computer or phone with a wallet like Green from nostr:npub1jg552aulj07skd6e7y2hu0vl5g8nl5jvfw8jhn6jpjk0vjd0waksvl6n8n or BlueWallet. Save up and get a hardware wallet when you’re ready, but don’t let someone else manage your keys.