Is social media widely used by adults (30+)?

Is social media widely used by adults, and if so which one is the most popular for people in their 30s-40s?

I’m in my 30s and will be spending most of the year on western Norway and was wondering if not having any social media (other than reddit) would make it harder for me to learn about events and connecting with locals.

I haven’t used social media in several years, and frankly not eager to start again, but I’m willing to do it for the sake of finding things to do, events to attend, and communicating with people I meet during my stay in this country.

Takk!