Adrian Morrison’s ESA course was the very first Shopify course, and still considered by most to be the best.
It’s a comprehensive course that truly covers all the dropshipping bases.
I like the different up-sell plugins he teaches, which proved to increase sales for me in the past.
Adrian also covers FB Advertising in superb detail. Facebook is incredibly important for dropship product marketing and ESA lays a solid foundation for you to build on.