I think its just you.

Just kidding.
First thing you should do is take a look at this thread:
http://familywoodworking.org/forums/showthread.php?t=597 Downoad and unzip the file in the first post. save the SKP file in the Templates folder under Google\Google SketchUp. Then open SU and go to Window>Preferences>Templates and select this file you just saved. Click Open and then OK. Restart SU and you should have a good starting point for drawing.
Now, if you want to draw a box for a cabinet that is say 24 x 24 x36, start with the rectangle tool and draw out a rectangle on the ground plane. Click twice, once for the first corner and a second time for the opposite corner. Now type 24,24 and hit Enter. You'll have a 24x24 square. Next grab the Push/Pull tool and pull the box up. Stop and type 36, Enter. The box will now be 24 x24 x 36 inches.
That'll get you a start.
Also look through the other SU related posts here.
Look for a PM. I'll be sending one shortly.