Step one: confirm your address
Before anything else, enter your full street address in the ordering channel you intend to use. This is the single step that determines whether the rest of the process is even possible. If the address is accepted, delivery is available for that order. Use the complete number, street, and unit so the check reads your location correctly.
If the address is not accepted, you have saved yourself the trouble of building a basket. Retry with the exact format your mailbox uses, then consider pickup as the backup.
Full address first. No cart until the check passes.