Vicki, assuming you're using a Mac, start up Airport Utility. If you don't know where it is, do a Spotlight search for it. Otherwise, it should be located in "Utilities" folder in your "Application" folder.
Once you've started up Airport Utility, click on "Manual Setup" button.
After this, you should see buttons/tabs for "Summary," "Base Station," "Wireless," and "Access Control." Click on "Wireless."
You should see a box named "Wireless Network Name" - that's your network name.
Now, on your menu bar on the top, click on your WiFi icon and you *should* see your network name listed - click on that. It should automatically connect without any hassle at this point.
If it asks for a password at this point, do the following.
Spotlight search for "Keychain Access."
Look for your network name on the list. Double click on it. A small window should pop up.
Near the bottom of the window, there's a box for "Show Password" - check the box and enter your login password. After doing this, it should show your network password.