In order to be able to create your own group, first you must crearte a user account.
Regístrate in Cribr.com! It is a easy, gratuitous and fast step that it will allow you, among other things:

• to Subir documentos with your user.
• Comentar more quickly.
• Registrarte in foro automatically.
• To create groups
• Corregir documentos
• to Enviar messages privados to other users
• To have mayor relevancia (karma) in the votings to value documents.

You can register your own user aquí