Just make sure whatever book or course you pursue isn't forcing her to draw things she isn't interested in.
When I was 7 or 8, my parents were nice enough to send me to art classes because I loved to draw many things except the rocks and leaves we drew over and over again in that class. I wanted to draw ideas and cartoons. We didn't have pullout art in school back then.
I would suggest buying stencils and French curves. Those can help her hand get a feel for the movements while still allowing fairly unfettered drawing romps.
