Customizing Member Areas Sign-Up

Site URL: https://www.waxthatbodco.com/

I am trying to edit the text in the box that pops up when clients start to sign up. Preferably, where it says "Create an account to unlock..." and "By joining, you may receive emails and updates..."

My client intends to use member areas as one private page with video content you have to pay for, one time. No email marketing will be used, and we want to clarify this is not a "membership" or "subscription", just basically paid access to a private page.

So again, to change these two text areas to say something custom/different would help us greatly!