You can still get things from Blender to ZBrush without GoZ; it's just a bit more of a hassle. Export the object as an obj, then import the obj into ZBrush.
imo get yourself blender or another polygon modeling software. Zbrush is not an end all solution, especially if you want to create hardsurface things other than that have a look at the extract function combined with zremesher and use polish brushes
This panel loop tutorial on the pixologic site was pretty cool. http://pixologic.com/zclassroom/homeroom/lesson/panel-loops/ Your needs should probably dictate what approach you take though, Zbrush may work for what you need using Dynamesh or ZRemesh or whatnot but as Ravenslayer said it may be more useful to look into a…