Looks good! It is very difficult to get the "teen look" in Poser. The figure and most texture maps are already smooth, so lack of wrinkles doesn't help make a teen character look younger than most other Poser characters. I think it's impossible to just sum up simply what you would do to a face to make it look younger. A lot of trial and error seems to be needed. You have managed to achieve that look here, so "good job"! :-)