I have in the past build sites in the following styles Wordpress,Drupal,Joomla,HTML,Script,Jerky and some other styles.
Start looking the documentation https://www.opensource-socialnetwork.org/wiki/all and download and try HelloWorld component and take a looking existing free component to find out how things works.
For further questions post it here.
Due to the many requests in the past for additonal features and components we have decided to develope a premium version. Features like Hashtags, Videos, Polls, Events, Stories, Link Preview, etc included in it.
$199 (Life Time)