Sure its possible. When we were setting up our roasting business we had a business partner who was an experienced roaster. However, the day we put money down on our new roaster, things went sideways with her and rather than give up the project, I decided to keep going forward on my own.
I read as much as I could on the subject and then had 8 hours of training on the roaster by the manufacturer. I then practiced roasting for a couple of months before opening the shop, giving away sample batches to friends and family while developing roast profiles and blends.
It helps to have a cooking background and discerning palate. After about 6 months of roasting 6-12 batches per week, I'm feeling pretty confidant with my roasting skills and technique.