As a DIY myself, and being a small build of a guy, I would consider making sure I have these tools, perhaps:
extension/breaker bar like this one:
https://www.kmstools.com/performance-tool-3-8-drive-long-handle-rachet-66834
Very handy. The propane torch can be handy, as well as penetrating fluid. I don't normally use the long breaker to tighten things up because you can easily strip bolts with it.
click type torque wrench. It's real easy to overtighten bolts. I've stripped aluminum threads because I didn't think I needed a torque wrench. I suppose an experienced mechanic doesn't need it for the things I'm tightening because they know how tight it should be by feel. I don't so I use a torque wrench. The exception is caliper hose bolt. I tighten with my short 3/8" ratchet. Then I clean and dry all around the bolt/hose area, start the engine and press on the brakes as if I were stopping for dear life. If I see brake fluid weeping, I give the bolt another tug and repeat until I don't see fluid weeping.
If you have a little extra cash lying around, get the largest 110V air compressor and a high quality (e.g. Chicago Pneumatic) 1/2" impact. Being a small guy and starting to age, doing lug nuts by hand is starting to get my back. I use this to remove lug nuts. To install lug nuts, I thread them by hand until they're well threaded, then torque them to the lowest air impact setting first, then the medium setting. I do finish with the hand torque wrench, but doing this saves my back.
Larry