I keep repeating to myself the only way to learn is to make mistakes. Well it's not the only way, but it can work. And skills even if well-taught still require practice before you're good at them.
So I've tried truing the wheel, which partially worked, except I punctured an inner tube with the end of the spoke. So I needed to add some cloth tape to in wheel rim to fix that. Then the next inner tube developed a hole elsewhere.
So I patched both tubes and put one of the back in. Unfortunately I put it in with air still in the tube, so the tire wasn't able to seat itself in the rim properly. So, shortly after pumping it up to 100 psi, the tube had a blow-out. (About 4 meters from the back of my head, that was really loud.)
So take it apart again and put the other tube back in more carefully this time to hopefully avoid the blow-out problem.
Along the way I ran across comments that if you round the nipples of the spokes you need to replace them. While learning to true the wheel, I wasn't using quite the right tool and so dented the edges, so I should probably replace them.
So I have learned more about bicycle maintenance, I just wish I felt like I was actually competent instead of being a hopefully talented amateur.