I have a '66 mustang coupe with the original 289. My grandfather bought it new and then gave it to me in high school. Knowing nothing about cars, I started dismantling it. I put a cam in it and did some other tweaking. I also took out the interior, which was original and absolutely in tatters. I soda blasted the exterior and then started to try to repair some of the rust spots. There are plenty.
Where I stumbled. I didn't know anything about cars. I didn't have any experience with body work or rebuilding an engine. I also didn't have much of a mentor, either. So, essentially, everything I did was trial and error.
I drove the car for a couple of years in college. However, at some point, it became clear I needed more reliable transportation.
12 years later, the car sits in a garage, covered up with only a primered body, an engine that may have a blown head gasket, and a 600 cfm carb that was never properly tuned. I haven't even started on the interior and the cowls are rusted and leak and will need to be drilled out and replaced.
I will not sell the car, but I do wonder what I am going to do with it. Honestly, to do it justice, I would probably have someone else do a much more professional job in restoring it. I can learn to do most anything, but not nearly to the quality a professional can. Its a shame it still sits.
Someday.