Started reading it and the math was way above my head. So I went to my calc teacher and he acknowledged the material was beyond my reach. But then he pointed me to materials to help and offered his time to explain the basics.
This was before there were countless free high quality learning materials online.
Are you going to learn differential equations, statics, dynamics, etc... in high school? Maybe. Probably not. Who cares? That doesn't mean you can't start.
Build a model rocket. Build an RC plane. Dive into more accessible subjects like linear algebra. Learn matlab or octave. I could go on forever.
You would not believe the amount of AE students that struggled - and I mean struggled with Ds through intro to programming with C. I helped many with their homework. Get a leg up and start on that!