You've learned a lot already. I can tell because you knew right off the bat that those wheels won't work for you. You need a rear wheel that accepts a thread-on freewheel.

I've probably built over 100 wheels myself. I've never even touched a tensiometer, let alone used one. You don't need a dishing tool, either, unless you plan to build many wheels. A truing stand isn't essential, either, but it's nice to have. Just don't get a Minoura truing stand. I had one and didn't like it, and I've seen lots of complaints about them. Your own bike is a decent truing stand. The only tool you really need for building wheels is a spoke wrench.