I am just as you are. I struggle insanely with studying for A&P, for my instructor sits in a chair the entire time reading from a PowerPoint word-for-word (and doesn't even include photos!)
What I've done to pass Anatomy is I spent too much money in supplemental learning products. If you're able to spend a little for the class, I'd definitely recommend Kaplan's Anatomy Coloring Book as well as their Flash Cards. They've helped me tremendously! You can find them on Amazon
for a good amount less than Books-A-Million or any other local bookstore, unless they're having a sale.
As far as knowing how I can handle nursing, I'm still not sure I'm cut out for it, honestly. It's normal to have those doubts. My heart is in this 100% though and am willing to do all I can to succeed. I am very determined, caring, patient, and have always worked great under pressure or at a fast-pace. I have a love for healing people or at least doing all I can to make them comfortable in their last moments. I cannot see myself in any other career. That's why I know this is what I'm cut out for. Anything I lack, I can create.
Best of luck to you!