1. Deploy the heartbeat contract from your own wallet
20 minUse a wallet you plan to keep as your builder identity, not a throwaway. Deploy on the chain you picked, and save the transaction hash.
Shipped my first real contract: Handoff Vault. Write plain instructions for your family, pick two guardians, check in now and then. Miss 90 days and they get the letter. It never touches your keys. Verified source here, feedback welcome.