Im in the same boat as you! Im 16 now but I was 15 when I made my first guitar. If I were you I wouldnt bother with a kit at all! Id just make the body and buy everything else. Making a body is pretty simple. Mine wasnt great because I didnt use any templates I just routed with my eyes as my only guides but it still turned out to be a nice guitar and plays very well.
I made the body out of Sycamore and I bought the neck and all the hardware. I think this is definately the way to go and it will give you much more satisfaction. I attached a few pics of what my guitar came out like.
I dont know if you parents would let you use a router or if you even have one?
I got a loan of one off my dads friend and my dad helped me with it and made sure i was carefull etc.
The only thing I would tell you if you were making the body yourself is to read the GREAT threads here about building and use templates.
And most of all take your time and remember you can ask plenty of questions here.
But then again what does a 16 year old know compared to the experienced builders on this forum!!
Thats just what I would do!!
Send me an email or PM if I can be of any more help!
Its great to finally see someone my own age here!!