Softer & Looser

Trying to get a fashion illustration feel, even if I've recently come to the conclusion that I'm in no way a fashion illustrator. Sure, I have fashion influences, but I never learned how to properly render fabrics, finishes and other clothing details - I just kinda know how to affect the flow (i.e. fake it) on drawings of women. I looked back to my body of work, and except for a brief period when I was designing clothing, I merely was the most able illustrator around so my mother used to make me render her sketches when her resident illustrators weren't around. This is why I want to go back to illustration school and learn from scratch. Except as someone who has to work, I wonder if that's possible just for the sake of the hobby?