Et bien Tienus, puisque tu appelles à des compléments

Voilà la version que j'aurais proposée (en me basant sur la tienne

)
Hello,
I send you this email because i read in one of your tutorials that you were looking for staff/helpers, but that it wasn't easy to find the right persons.
This is why I would like to join your team as helper. I have been using your network for 4 years now, so I can say I know what services you offer and it would be a great pleasure for me to contribute to your network and work with your staff.
I have a lot of spare time and I am ready to devote myself entirely to it.
For information, I am Belgian, I am 22 years old, my mother tongue is French. I have also knowledge concerning linux reported to IRC.