Learning Zbrush

I bought Zbrush a couple of days ago and I've been having a play with it. I don't know why I decided to sculpt a man who needed the toilet but I have, and this is where I am so far with it. I found Zbrush really over complicated, especially when you only really need it for simple things. I'm sure as I get used to it I'll find the controls a lot easier, but as it's so different from any other software I have used I'm struggling to get to grips with it, particularly how to zoom. I do however find it a vast improvement from Sculptris as I am now having no problems with the mesh, symmetry can be easily toggled and obviously it can do a lot more things that will come in useful as I learn to use it.