ManoVelho,
Welcome!
Very nice first sketch, it has a nice natural and loose feel which is really pleasant. I hope to see more of your work here, and I hope that you will participate in our many Workshops - to be notified of when new Workshops begin, I recommend subscribing to this thread:
Notification of New Open Figure Drawing Workshops / + TUTORIALS - SUBSCRIBE HERE!
http://forums.cgsociety.org/showthread.php?f=199&t=379951
Take a look around the forums and other peoples’ sketchbooks, there’s a lot of great work going on. 
Cheers,
-Rebeccak








