By "creating models" from scratch, do you mean to create an original character that is not already furnished with Poser? If so, you will need a 3D modeling program and lots and lots of time to learn many things - it is an ambitious goal! If, on the other hand, you are talking about customizing one of the Poser characters, then you've come to the right place. There are lots of folks here that can help. Can you be more specific in what it is you want to learn?