Hard to add what everybody has already said and Jives has summarized. Once you have the car, start with the basics, change the oil, adjust the brakes, tend to what needs to. Ask for help here and on your car's forum.
Joining a local Club is a real good suggestion. Chat it up at cruise nights or local shows.
If you need parts, got to a dismantler (junk yard). Take off the needed part yourself from the junked car, thats half the battle of "remove" in "remove & replace"
When you get frustrated, and you will, walk away. Come back. Now some here might say a good whack from a BFH works in that situation, but I've always regretted that.
Good luck!
if you cant fix it with a hamer, you have an electrical problem
at your age finding a "mentor" might be a good idea.
show an interest in "all things mechanical"
car shows, swap meets, cruise nights, usally good places to meet car people.
i have noticed in my past experiences, a lot of car/truck clubs can be extremely "clickish".
if you dont have the same kinda car/truck, ie: show cars, antiques, 50's crusiers, muscle cars, jeeps, ect, ect., they can be sometimes downright rude.
couple years ago, i was at a truck only show, it was open only to trucks/suvs, 2x4 or 4x4
i was parked next to a guy who (in my opinion) had a killer '55 ford PU. really nicely built, but definitely driven, cruiser.
he had belonged to a couple of local car clubs, and was looked down upon, cuz he had a truck
at the end of the day, he was amazed by some of the engineering, and thought processes that went into a few of the 4x4's that were there, mine included, he's been back to every truck show since, and always has a great time just BS'n with other truck owners.
