It's time to roll your sleeves up and install BuddyPress. This takes a matter of seconds and is no different from installing any plugin. Follow these steps:
In the WordPress admin, go to Plugins | Add New.
In the Search Plugins box, type
BuddyPressand hit Enter.Select the BuddyPress plugin and click on Install Now.
Once the plugin has installed, click on the Activate link on the page that appears to activate it.
Once BuddyPress has been activated on your site, you'll see the BuddyPress welcome screen:
Fig 2.1: The BuddyPress welcome screen
Click on the Get Started button to start setting BuddyPress up.