POP or IMAP?

You do not determine the type of acount when you add it to the mail app. The is a setting on the mail server and is determined by what your prover offers, and whcih you selected when you signed up with it. In some cases you can choose to use POP or IMAP, but that isn't something than can be set from the mail app on your iPad. Most of the time, when adding the account tot he iPad, it doesn't matter. It will be picked up automatically.

As far as setting up a new email service, I strongly recommend IAMP, especially if you intend to check and mnange mail from more than one device, or if you wish to be able to add additional folders (mailboxes) once you have it set up. POP will not work well for either scenario.

If you are adding Gmail. you should choose the Google / Gmail preset to get the appropriate settings for Gmail rather than using the "Other" option.

The Google option will fill in all those values.

If you selected Google as the account type in the first step, you shouldn't have to manually set those.

I know you are using the other option. What I'm saying is you should use the Google option instead. It will configure all that for you. Why are you trying to do this manually?

Even Google's own help site suggests you use the Google Option.

In any case for server settings you can use Google's Help page.

https://support.google.com/mail/troubleshooter/1668960?hl=en

Tap on "I want to Enable IMAP' then on Apple Mail (since you don't want to use the Google option as described for iPads), and then on "O.K. Confirm my Settings" And use those server settings for incoming and outgoing. servers.

You're welcome. Glad you got it sorted out.