I replaced them with the help from a member of TTORA. I am the same way mechanically. Pretty intimidated by a lot, and everything I do, it's my first time doing it.

The replacing a suspension is easy. With the right tools and 2 sets of hands, I would put it at 4/10 if I had to guess. The hardest part was getting the old, crusted stuff off. PB blaster and a Sawzall made it easier.

edit: and my .02 is if you're gonna buy a new suspension, lift it. You come pretty darn close to being cheaper then buying new 99 coils from the factory. One of the cheaper options is the tundra/Land Cruiser lift. Ive seen a few people tally their lift as being around $400 total.