[MENTION=175800]TrexRunnerGirl[/MENTION] it sounds like to me you really want to be self-sufficient with doing repairs and mods on your rig and that's a very good thing. You'll be saving tons of money while learning how to wrench and you'll get an incredible sense of accomplishment from it.
To be successful you need 3 things, a willingness to learn, tools, and knowledge. It sounds like you have the willingness to learn and you have tons of knowledge at your fingertips with the internet age. It looks like your major hangup is tools. I'm not going to lie, tools can start to get expensive especially if you have a tool buying disorder like me. But, start off with the basics. 3/8" and 1/2" ratchets, sockets, swivels and extensions. A breaker bar and some pry bars. A set of ratcheting box end wrenches. Screw drivers, channel locks, needle nose pliers, dikes cutters.
I buy most of my stuff off Amazon and base my purchases off the reviews. Stay away from the fancy brands like Snap-on. You're a DIY mechanic and don't really need to spend that kind of money on tools.
Teri, I encourage you to take up the challenge. Don't let auto mechanics intimidate you. Use the video [MENTION=102606]infamousRNR[/MENTION] and I made for this job, rent some pullers from an auto parts store and either buy or borrow the rest of the stuff you need. Is it common to run into issues when you're in the middle of a repair or mod? Yes, it's part of the experience. But, when you overcome those obstacles, it just gives you more confidence than you had before.
I look forward to hearing you report back on your successful LBJ Replacement. Good Luck Teri!