Two months ago, I've registered to a new account with WordPress.com, purchased a domain with them for $15 and blogged for while.
Then, I've realized that I wanted to do something more but requires Plugins feature which I didn't have one. So, I've decided to get a host so I can expand to Buddypress by using Plugins for installation.
This morning, I've purchased Media Temple Host only (Grid-Service) and added my existed domain that I've been using for two months. Next, in the 1-click application for WordPress, I've selected "Add New Application", clicked "Start" for WordPress, installed successfully, clicked "Finished', and went straight to my WordPress website.
Unfortunately, Plugins feature did not appear in my Dashboard and unable to install Buddypress without the Plugins. I've spent all day figuring out how to add Plugins feature.