Welcome to AFM. This site has been a great source of info for me. Not sure what to tell you about needing an engine change (my guess is that you will need to provide more info), but I think the mustang is a great car to learn on. Before my v6 mustang, I had done basic stuff like oil changes, break pad replacement, etc... Now I've just completed my first clutch change, and it was very successful (after getting some help on this site). Next will be the limited slip diff. This car is by far the easiest one I've ever worked on. Rear wheel drive makes drive-train repair work much easier than front wheel drive cars, and the v6 gives plenty of room to work under the hood.