lol, its really simple, once you do it once, you'll get it.
Go to your tool bar and click on Insert, then select Picture. Scroll down to Autoshape, select Basic Shapes, then select the oval.
Then go to Format, then Autoshape. Select the Colors and Lines tab, then Style, and select Round Dot from the drop down. This Tab also alows you to select the color and thicknes of the line. It also allows you to fill in the circle with color. Just play around with it, its quite addicting!