new board?

Okay well im 14years old, weight 53kg and am about 5ft3 tall and i surf at rest bay every weekend theres waves and on holiday around the UK. I have been surfing for 2.5years on a 7ft3. Im really bored of it and i want to get a shorter more challenging board.
I emailed one guy and he told me to get a 6ft8 with plenty of volume...but im thinking that I want to go a bit shorter, because Im not expecting to able to ride it straight away or anything.
Ive seen a 6ft2x19 1/4x2 1/4 JP board, which I really like. Its second hand but in very good condition and costs £175. I was wondering if this sounded good for me...or would I be better getting a 6ft8 like that other guy told me.
Thanks for your help guys.
x meg
I emailed one guy and he told me to get a 6ft8 with plenty of volume...but im thinking that I want to go a bit shorter, because Im not expecting to able to ride it straight away or anything.
Ive seen a 6ft2x19 1/4x2 1/4 JP board, which I really like. Its second hand but in very good condition and costs £175. I was wondering if this sounded good for me...or would I be better getting a 6ft8 like that other guy told me.
Thanks for your help guys.

x meg