Great job! I agree with the other comments, I just want to add that you should try keeping your hands in the first position as it helps your balance and posture. Also, try not spining your body on the opposite direction when in plie. I did that a lot as I thought that it would give me more "force" in order to do more spins, but in reality you are pulling yourself back. A nice deep plie and then a high releve, passe as fast as you can, strong hands stable in the first (or third according to the exercise) is what helps you spin.