For simplicity and ease of use, I'd recommend using Strike to buy bitcoin. Once you own enough bitcoin that you'd be sad if it went away, then you may want to look into what's commonly called a hardware wallet, such as BitKey.
My man nostr:nprofile1qqspnzgrfett3asxcuj0gksje6z2zxzpvgd27uvz58m9vsuqh8...
