I'm 5ft tall and weigh around 90lbs - 95lbs. I've currently got a 143cm that I've had since I started learning. I'm now at a more intermediate level and and starting to learn to do some trick and really want a shorter board to play around with. So I'm looking at the 139cm - do you think this will be ok? In addtion, I won't be spending all my time in the park and want to know if this board will be fine for general riding.