Launching my first product in 30 days

I am planning to launch my app on playstore in 30 days. This is more of an MVP launch. The product is mostly around a social media for working professionals. To limit the discussion, you can think of it something like an amalgamation of Linkedin and Quora. What is the best way in which I can use these 30 days? I want to sort of create an audience before I launch the product.