You can delete your Gmail account in the "Data & Personalization" section of your Google account settings.
If your regular Google password doesn't work for syncing Gmail accounts, visit https://myaccount.google.com/apppasswords to create an app password. Simply create a name for the password -- I used ...
Google provides 15GB of storage per account across its services — Drive, Photos, and Gmail. It's not a lot of space, and it can fill up quickly if you don't manage it regularly. That's why it's ...