How to use skype! http://www.skype.com/intl/en-us/support/user-guides/skype-for-mac/how-to-use-skype/

How to add a contact To find friends so that they can be added to your Contacts, select the “Search for Skype users” option from the “Contacts” menu or press the “Add a contact” in the left corner of your Contact list. A new search window will open where you can search for friends by name, or any other information they have listed in their Personal Profile. To add a friend to your Contacts, simply select the name from the search results and click the “Add” button. When you start Skype for the first time you will already have one contact added to your Contact list called “Skype Test Call”. You can call this automated testing robot to see if your headset, speakers and/or microphone are working properly.

How to make a call Select a Skype Name from your Contact list and then click the green Call button . Depending on how you’ve set your preferences, you may double-click on the Skype Name in your Contacts list or search results. Control-click or right-click the Skype Name in your Contact List or search result and select “Call”. You can also click on the drop down menu button and select “Call”. Type your friends Skype Name into the address bar and hit enter. Select a Skype Name from your Contact list and select “Call” under the “Contacts” menu.

How to answer a call If someone is calling you, you will hear the sound of a telephone ringing and a floating call window will appear on your screen. Click on “Answer” to accept the call or “Reject” to decline it. As soon as you decide to answer a call, a two-way voice conversation will begin and the duration of the call will be visible. Either party can end the call at any time by clicking the red “Hang up” button.

Update your profile After you start using Skype you can enter information into your personal profile by choosing “My Profile” under the “Account” menu. Entering information in the personal profile is optional but your profile will help people you know to find you on Skype. Personal profile information is not stored by Skype. However, it will be visible to other Skype users. Please see our privacy policy for more information. If you decide not to fill in your personal profile or if you want to change something, you can always access your profile from the “Account” menu in the Skype software.

Online status Your online status is shown in the status bar of Skype (located at the top of the Skype window). You can change your online status by clicking on the status icon or by selecting “Change Status” from the “Account” menu.