are you asking how to create a basic multi-user authentication system with features such as private messaging and editable full-page profiles? if you are, i doubt you can find a tutorial for that large of a project. otherwise, you would want to start by figuring out how to create a multi-user authentication system using php and mysql
that tutorial basically gives you a source code with the database table structure. if you don't know php, you're either going to have to learn, or you're going to have to hire somebody that knows php.