Hi Lizz,
As others have said, once you have had your trial flight, you will be hooked. As to the maths....i am certanly no mathemetician...others have said that you need a "C" in GCSe Maths and Science. Well, I would say thats..although very helpful, not essential. I have an "F" at GCSE maths and a "c" for GCSE science and yes, I do struggle very much with teh Maths and the Science study/nav planning. Whizz wheels and conversions...I hate em! (especially when you ahve your licence you can use GPS

) QFE/QNH calculations...nightmare - especially when ATC and the ATIS give you the Airfield QFE and RPS QNH anyway. Converting degrees C into degrees F...why??!! Will I REALLY need to know this when i'm flying? (now I guess someone is going to jump in and say why I DO need to know these things) i'm just leaving that bit out of my Met study. But really, my goal is that licence and I will overcome my maths and science difficulties to do it.
If you have the motivation and the passion to succeed and get that licence you will. The end goal is whats driving me forward.
So Go for it!! have fun, get your dad to help you with the maths and science, and your FI to help with Nav and other ground study and you'll get there. If you already haev friends who are pilots, ask them for help too. My pilot friends are invaluable - even with just morale support when things are going badly. Spend time around your club or school, no time at the airfield is wasted.....its also very enjoyable (especially with a plentiful supply of cheap coffee and chocolate

)
Good luck with it

GQ