replacing the panel you described is not very hard. The tools you'll need are a mig welder prefferably, sanding supplies, wheel cutter or saws-all. Cut the old panel off, well the new one on, grind welds smooth, smooth with body filler and prime/seal and paint and your done. If you need a step by step let me know, I'll do what I can to teach you how to do it.
Replacing a entire body panel isn't something to start out on, do you have any body men/women to help you? If not, have you checked around for better prices at bodyshops? If not let me know, I'll do what I can to help you.