I really like the new changes to the AP physics course. The new course, AP Physics 1 is more about understanding rather than just plugging and chugging.
It helps to start by building up your conceptual understanding muscles.
To do this, I’d recommend you watch some youtube videos by Veritasium. All of his videos are good, but his ones on physics misconceptions are really great.
For this class I’d recommend you at least watch these:
Can you perceive acceleration?
When is a bungee jumper’s acceleration max?
Three incorrect laws of motion
Khan academy and the effectiveness of science videos (just so you can think about your own learning process and what your preconceived ideas are)
What is gravity?
What forces are acting on you?
Is there gravity in space?
Which hits the ground first?
Misconceptions about falling objects
Best film on newton’s third law, ever.
After that, get a head start on solving some physics problems. For this, try using the site The Physics Classroom.
Start at the top of the list of their topics, and work your way through, making sure you try the practice problems.
Also, I have some free books on Amazon that I think would be really helpful for you, because they’re focused on conceptual understanding and problem solving. For this class, work through these to start:
Electric Circuits, Rotation, and Momentum would also be good because they’re covered in this class, but you won’t get to them until later (and they’re not free).
If you want to practice AP test questions, this book is a good one, written by a physics teacher (not me :).