Twitter, Facebook, and other social media

I have been trying to promote my first book on social media and noticed on twitter, rappers follow rappers, writers follow writers, so basically all we are doing is promoting to one another. Hence then problem with elevating book sells and reviews. Now Facebook on the other hand is family and friends. Most families will assist you in journey to do better but friends... They want to see you do well but not better then them. So, where do I go and where do I start once I get there? So far I'm still in the process of getting something down. Just not sure what at the moment. This is all trial and error at this point, let's see how this works. Plan B is now in effect!