Write some Software

I have encountered a problem. I just found out that the Elegant Themes don't come with a registration/login/profile plugins/forms. I have installed the 'Divi' theme. What I want: - Users being able to register and login - After registering, users are sent back to a registration confirmation page, with an option to sign up for a 'plan'. - I want a normal user profile front-end. I just registered a test account with a registration plugin, but the users are redirected to a standard user-profile which is ''disconnected'' from the actual website (it looks like the admin interface). The users should be redirected to the actual website, and their ''profile page'' should be part of the main theme. - The ''register / login'' buttons should not be visible when a user is logged in. When I logged in on my test account and went back the homepage, ''register / login'' buttons were still visible in the main menu. The ''register / login'' buttons should be replaced with ''User Profile'' (or something similar), with a drop-down menu (view profile + sign out). We don't have a blog where users can post. Users can create an account and register for a service. If there is a WordPress developer who can help us, please send us an email with your quote.