there are a few DIY sites taht will have pics, but for simplicitys sake, just find the studs with a stud finder (a nifty little device ), screw on that little bit of wood that supports the weight of the cabinet (God knows what its called), hang the cabinet itself then keep screwing
...and you should find a guy to come out to hang a single cabinet. easily. just offer cash and get someone to do it on their way home from another job.
Put screws thru, the "hang rail" , ususlly along the inside top of cabinet.
For "upper" cabinets it really helps to have at least two prop sticks
of anything cut to length so you can rest cabinet on while you are
screwing in.