Congrats on surviving high school!
imo, these ideas sound good: Go to a rave/concert/festival, rollerblading @ those old skool skate rinks, backpacking or hiking, get a gym membership, fishing, karaoke w/ fam or friends, beach day, biking/scootering/blading around your town/city, sleepovers...and for the most realistic answers, binge playing games or tv shows.