I don't recall anyone I knew using Instagram very much in 2012, people still used facebook a lot back then and Instagram felt really niche. It hit 110 million users in 2013, which is around when I recall people I knew starting to use it, but rally it blew up in 2014.
Yeah, Facebook started in 2004 and it was much more Instagram like in its early days before everyone's parents joined and started ranting about politics.