Weekends

Since like all of highschool, (I’m a 17 junior now) I’ve done nothing one Friday’s and weekends besides playing videogames and maybe doing something with my family but I just feel like I’ve missed out on 3 years of my life. Thing is I want to go out and do stuff but I don’t know how or what to do or anyone to do anything with. So I’m curious what most people our age do one weekends? What do you do? How did you start doing stuff?