It would be a good idea for you to follow tutorials and read articles or some books if you want to learn :] We're looking for people who are confident in their skills already when they want to contribute, and while we all learn during our time here, we have to know what to do in the beginning.
Some of us are more than happy to give people pointers and tips as we work, but being full-time tutors is not something our modelers have the time for, that much I can tell you immediately..
Keep studying and practicing though! Our community is full of artists who will be happy to help you out if you post your work here for critiques.