If you're male and bi/gay, Grindr can usually get you someone within 15-45 minutes.

If you're not, parties are a common option, clubs, bars (if you're of-age), all solid options, and of course there's the app route (mostly just Tinder/Bumble for straights). If you go the app route you might want to consider putting some effort into taking photos that aren't shit, and in your bio you may want to indicate if you're "not looking for something serious" to imply that you're moreso looking for the old Netflix & Chill, the Smash Bros & Smash, the Stream & Cream, etc.

Also for the love of all things holy, use protection, 'cus college is stressful enough without any surprises if you catch my drift. You can usually get them for free at Wolverine Wellness if there isn't a convenient massive box of free ones at your RA's door or one of the RA's of the hall above/below you.