You have almost as good a collection of offcuts, and old rubbish in your garage as I have. The car only just fits! Cant stand those folks whose garage is like an operating theatre.
Anyway, good for you replacing the covers. You have learned more than you think there, because all the greasy bits are pretty near as simple to take apart. The key is to do so slowly, methodically and ( if your memory is as geriatric as mine) taking phone photos at every stage so you know how to put them back again. So you can now try simple jobs like brake pads and oil changes and thermostats and the like with some confidence. Go to it!