This software is not for everyone. You must match your expectations to its capabilities.
Despite the "Mini" moniker, the software packs a surprising punch. Here is what you can do right out of the gate. pixologic zbrush core mini
You cannot apply color to your model inside Core Mini. You are limited to the MatCap grey/wax materials. If you want a colored character, you must export the OBJ to another program like Substance Painter or even Procreate. This software is not for everyone
ZBrush Core Mini uses the exact same brush calculation engine as the full ZBrush. This means the brushes are not "lite" versions; they are the real thing. they are the real thing.