Hi @Nixwebdev, thanks for posting.
There isn't an option to directly transfer email from one service or plan to another. You would need to manually backup and save any emails you'd like to keep, and then setup the email address on the desired service as a new email address.
There isn't a way to export an entire email account. You could potentially use an email client to download all of the messages in your account and save them, but I wouldn't have steps for this or any recommendations for how to import them into a cPanel email account.