How To Become A Model - Modeling Portfolios - Fashion, Glamour and Photographic Models
It's free to join it, forums are really good and most people are helpful. You can search for photographers near you and then contact them, lots will contact you too.
Just upload a clear head shot, adn a full length, then a bit of a mix. write a bit about yourself, what levels of modeling you'll do etc. Start off with TFCD/ TFP (time for cd/ time for print) these are shoots that no cash changes hands but you get experience and a cd or print copies of the pics.