First, ensure you are visiting the correct URL. Because sites like this often change domains due to copyright scrutiny, it is important to find the current, active link. A quick search engine query for "RipperStore" should lead you to the legitimate site.
Creating an account on is a restricted process primarily designed for the community to share and find VRChat assets. Unlike standard web platforms, it currently uses an invite-only system for registration. Registration Process create account ripperstore