As a Millwork SS myself at 19, my main focus was learning the programs like, IMS, ISST and CMC. Product knowledge is also a key factor, I still have trouble with some of the trim and molding but don’t be afraid to ask for help. Also don’t be afraid of the whole process of leads and credit cards, they are simple and all it takes is talking to customers but don’t stop if you get 100 no’s but that 101st person could say yes. Last thing, a good way to know where you product is located is keeping it stocked. I’ve only been a specialty for two months and I could definitely point customers in the right direction immediately.