I"m at the beginning of the course, lesson 2. When I signed up for the class, I thought it was watercolor based. I am a watercolorist and not sure I want to spend the money to purchase all the acrylic paints that are required. Should I drop out -- or can I just use watercolor paints instead once we start painting. And if so, do you have any special watercolor colors that you specifically want us to use. Thank you