Congrats on getting in!! I'm in Nursing 3 there, I'm not going to lie its not easy when you have other classes to take, but it is doable! But if you can get all the prereqs knocked out before you...
I don't study from the NCLEX books either. I read the material, any power point print outs and my class notes. NCLEX books are good to use, but do not rely on them as your only studying
I took A & P II over the summer and it was fine. It was a little on the fast paced side, but if its the only class you are taking you will be fine! Good