Good news - just about any digital camera will do what you want.
The secret for good portaits is lighting.
Spend a few dollars and get a few flood lights.
The important thing for handling the camera is to be sure and use a bit of optical zoom. About 2X is fine.
If you do not use a bit of zoom, the subjects features can be slightly distorted. Things like, making a nose look bigger.
A tripod can be helpful too.
No sense in spoiling a shot because you moved the camera while tripping the shutter.
Which are the better cameras for a novice digital camera person who wants to take good head and face shots, preferably with good automatic focus?