Ah, thank you. I kind of half-knew most of this, but I needed it spelled out for me. Except the names, of course, I didn't know those; or the source.

And it hadn't occurred to me - for I am slow of study - that you could buy cultures on the internets. Of course you can buy cultures on the internets.

On the other hand, you can also find how-to-start-your-starter methods on the internets, and I think I might try that first, just for the hell of it...