There's quite a lot of tuts about and in the last few days I've seen 10 or so. Yes, it's a little different, I don't know if it's tougher than TG. In fact TG is more straightforward, just a line of nodes

In ZB you have lots of 'hidden' possibilities, which may be hard to find. Like setting the color of fast-preview hair curves

The eyes of these DAZ figures give me trouble as the cornea is a glassy part (glass shader... simple), but as the whole figure is doing shadows, so does the cornea, hence a very dark iris. Too much work to exchange whole eyes.