Attached Link: http://www.contentparadise.com/us/user/search.php?substring=&provider=pc0&sortby=date&onsale=1

You might like to have a look at PhilC's Clothing Designer. Although not a full modeller, it works within Poser and would be a good starting point. You can progress from there once you've seen how the basics work. It's a good idea to have a learning curve that gives you something useful at an early stage; you're less likely to lose heart that way. ;) Edited to add: on sale at Content Paradise at the moment. The Clothing Designer Bundle is 40% off...