Need advice to create user base and monetisation methods for my social network

i'm creating a social network of my own right own(old wine in new bottle). but, i don't know anything about digital marketing the only thing that i want to do is to know the required tools(must be opensource) and to get the required user base to adopt it just like how quora and facebook did in its early days. Advise on how to monetize the network is of prime importance anything is welcome now.

Do you have like 500K USD/Month for per month for 12 months for advertising?

if yes, go for it. If not, dont even think about it.