Good luck Gavin. Please do your research or even post another question about innings pitched, pitches thrown, and general arm care. Lots of conflicting advice out there, but please form a plan on paper. Those are a lot easier to follow.
Are your parents, or perhaps an older sibling, helping you? Lots of information to sift through...I can't even imagine my 14 year old coming on here and asking anything, he's still trying to figure out which shirt best matches his work out shorts and how best to wear his glasses on his hat, lol!
If you have questions go ahead and ask them, it's why this board is here :-)