If I upgrade subuser account, will it become a primary account?

If I upgrade my sub user account will it become a primary account and will I retain all my forms and history?

Upon checking your account, you currently do not have forms. Please note that whatever form is shared to you, will always be owned by the one who shared it to you.

Your account is a primary account by it's own. You can create forms within your account. These forms will be owned by you. However, as mentioned, you will only be an owner to your forms but NOT for the forms that is shared to you.

You can upgrade your account anytime, but any account limits reflected on your account will only take effect to the forms you owned.