dont know where to start restoration

Im 14 years old and rescently i was fortunate enough to purchase a 1966 289
8-cylinder mustang. It's not in running condition. I have a moderate knowledge of cars and i am hoping to restore it to its former glory. i know that it is a giant undertaking.

My main question is where should i start.

(also keep in mind that im paying for most of it so i cant afford a 10k paint job)

Thanks everyone!  

Start with the motor. Get it running. Then Brakes and check the running gear. Thats when you can start on the body and interior. We have had 5 mustangs, show and just drive around. Wish I had them all again. Hope you don't have any rust in it. If you do, do not go cheap. If you don't you will regret it in the long run. I was 15 when I got my first mustang. I worked for each part of the project and understand where you are coming from. You can do it. Just take one piece at a time. Just take your time. It will be worth it.  

thank you very much

i looked and as far as i can see there is minimal to no rust, which is kind of odd due to the fact that it was sitting in a barn for 3 years.  

Start with a very thorough inspection and know everything about the car before you make plans. Get a book or manual or two about it and study up. Rust has a way of hiding from view, and many times a very solid car will be badly rotted in just a few small places. Roll under it and just stare at things, think about how the car works and look for wear and damage. Check for loose bolts, etc. Trace the wiring harnesses and look for damage to the insulation. Check important electrical connections. I say make it run smooth and cool (fuel system might need work after sitting so long), put tires on it, get brakes going, steering and suspension safe, all exterior lamps properly working, then drive it and fix what breaks. I like the old 5/50/500 rule: Drive it five miles, fix what breaks. Drive it fifty miles, fix what breaks. Then, drive it 500 and you probably won't break it but by the time you get home, you'll have a list of things to fix! Just some words from an old bodyman who has been there many times, although I never owned a Mustang.