How do I move my folders and emails from my current email account to a new one

First - and perhaps most important - does your old email address identify your AppleID?

Consider that an AppleID account is intended to be used for life. If you need to change the primary email address that identifies your account, or your secondary (recovery) email addresses or trusted telephone numbers, you need to update your AppleID account as necessary.

Change your Apple ID - Apple Support

Change your Apple ID password - Apple Support

What to do after you change your Apple ID or password - Apple Support

Change, add, or remove Apple ID payment methods - Apple Support

Few of us will have the luxury of forever keeping the same email addresses or telephone numbers - sometimes these needing to be changed for a variety of reasons. However, updating our AppleID account, maintaining access to our data and purchases, is easy and relatively straightforward - accommodating life’s many changes as they occur. Using a completely different AppleID account can introduce many complications and issues, not limited to losing access to paid Apps, subscriptions and services - these being forever tied to the AppleID account from which they were purchased.

Also consider that unless you keep your AppleID account properly updated to reflect essential changes to email addresses, you may lose access to your AppleID account and/or be permanently locked out from both your account and your Apple devices.

Mail

If you have one or more new email addresses, these will need to be added to your iPad:

Add an email account - Apple Support

After adding your new mail account(s) to your iPad, assuming that you are using IMAP mailboxes, you might use your Archive Mailbox to store Mail that relates to your old email accounts. You might create separate mailbox folders ("mailboxes") for your previous sent and received email. When corresponding folders (mailboxes) have been created, you can move mail to your newly created archives.

Organize email in mailboxes on iPad - Apple Support

What Apple device? What operating system version is it running?

You posted in a forum section that is titularly for reporting problems with using the forum software. Your post will get few views here.

If we know you Apple device, we can ask the moderators to move you to a more active and appropriate forum section where you will get faster assistance.