About 10–20 minutes. Get a memorable address and prove mail works.
You’re done when: you’ve chosen a domain and a name you’d claim on it.
You’re done when: the portal shows your address as claimed.
You’re done when: you can open the inbox and see mail arrive.
Prefer Apple Mail or Outlook? Use the portal’s IMAP/SMTP or app-password instructions, add the account, and test both directions. Skip this if Webmail is enough.
Next door when you’re ready: Choose your path.