Since we seem to be giving you scattered advice, I'll weigh in on what svdl said; learn Poser first. Learn how the program works, get comfortable with it. On the one side, there is a ton of clothing and hair that is free or quite inexpensive. On the other side, modelling -- even the rigging of a pre-made item to fit within Poser, is not a trivial task. Best to have some practice walking before you begin to jog. (Modelling and rigging are also a ton of fun. If you get that far, be prepared to enjoy yourself).