Not too much difference in 154 or 152, the only resonance I recommended the 154, you're still growing and it would suck yo spend that kind of money on a board that's too small for next year when you will use it most
he has this one too... its a 144 strictly for street type riding, jibs, pressing, rails/boxes and small jumps even though he hits the bigger ones with it too. My wife is next to him in this picture, she rides a 144 also and is 5'2" too.
Just remember that the rockered boards are a slight learning curve and the double dog will also have a slight learning curve. you will have to give it a day to get used to it.