Start with the basics guide if you have not yet bought a domain: it explains how the domain, website and email address fit together. Then answer two questions: which extension you want, and whether you need a full mailbox on your domain or only forwarding to an inbox you already use. Those choices narrow the registrar and email options considerably.

When choosing a registrar, compare multi-year renewal cost, privacy and transfer rules rather than first-year price; the registrar comparisons and the WHOIS privacy explainer cover those points. For email, read the mailbox suite comparison and the free mailbox and forwarding guides to see where each option stops.

If you already own a domain, the transfer checklist, the expired domain guide and the Google Domains shutdown page explain how to move or recover a domain without interrupting email. After any DNS change, check your sending records with the guides in the Email authentication hub.