After listening to Youtubers and the advice on this forum, I am starting with a single Neewer TT-560. If I get frustrated, and decide not to pursue photography, I'm out only $42. The Youngnuo was $80. The Neewer doesn't have zoom, like the Yongnuo, but, if I need zoom, I can maybe make a softbox out of a piece of cloth, and a panel from a 1 gallon water jug. For a mount, I'm going to go, for now, with a stepladder and some clamps. A couple of sheets, and a couple of styro insulation panels, and I can play with light for awhile. Should tell me if I have what it takes.
"Digital Photography Lighting for Dummies" from the liberry. Read, do, read, do.
If everything goes well, I'll get more equipment. If it doesn't, the sx160is is still an excellent camera.