I think you can definitely improve. I started with a Q34 and have improved to Q40 using the manhattan books
. I am trying to raise it to Q47+.
It takes time, but it's definitely possible
Yes, I think I can do it if I have enough time, My exam next week and then I have to inform the school of my result to start this September. If I do not get 650 I will have Only one more chance next month. :/