I submitted the tv series myself because I am the creator. However, I used an alias when I created my IMDb account, so it's not my real name. Am I allowed to create a new page with my real name under the tv series?
Any registered IMDb user may submit update requests for virtually any Name or Title page. There is no connection between the person named in the credit and the person submitting an update request.you
So, in short, yes, you can submit a credit that will create a Name page for you from your current account no matter what UserID you selected forl your User account.
Note: if by 'my IMDb account' you actually meant a Name page, then you would need to add the credit to it, not create a second Name page.