sounds like you're looking to take lots of portrait or at minimum people as your subject. Well, before we suspect any camera problem, let's start with a few setting.
1) turn your dial to auto mode
2) turn your ISO into "auto ISO mode" and if you can set the range, set it from 100-3200
3) change your focus to "auto"
Point to the subject half press the shutter, you see your subject in focus? press shutter full, that's it.
If you're looking to get more complicated, you'll need to read up on some stuff about how to control your camera, and a little bit on depth of field and portraiture, all of this can be accomplished in an hour or two with your camera, you don't even need a person to test this stuff out, use something as a prop to test, a fan, a chair, ect...
Here's a little cheat sheet, it might help you out
http://media.digitalcameraworld.com/files/2012/05/Depth_of_field_photography_cheat_sheet.jpg