the next thing to learn is your own brake job start with just pads and when youre comfortable with that start doing rotors too like the other person said start looking at diff fluid then tranny fluid and filter learn how to inspect bushings in your steering and suspension systems look into cleaning things like mass air sensors and throttle bodies spark plugs and the rest of the ignition systemcoil onnear plug or distributor are easy too these things are all stuff you can do maybe with the exception of tranny fluid and filter that can get messy might be easier just to pay someone to do that you can keep your truck out of the shop for the most part if you can learn these things