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.

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