Login your cPanel, under the heading Email, click Email Accounts.

This will lead you to the Add Email Account page. Go to the
Add Email Account tab, fill in your desired email address, password (if your password is too weak, the system will not let you proceed), re-enter your password again, and finally set the quota limit for the specific email address. If you wish to configure your email account to other mail application such as Outlook, iOS or Android please tick the "Send welcome email with mail client configuration instructions" or read
the page here.

That's it! Your new email address is ready to use. Here is how you can
access your webmail. Go ahead, try sending or receiving a test mail.
If you prefer a video tutorial on how to create an email account in cPanel, click here.