How do I add information (Like an account, and payments I make) so I can raise my credit score? My score is currently non-existent.
You can add a statement (see link below) but you cannot add accounts or payments. For the latter, you would need to contact your creditor directly.
https://www.experian.com/blogs/ask-experian/be-cautious-about-adding-statements-to-your-credit-history/