I don't know your specific circumstances, but unlike most people I know I look back on University as 3 year panic attack. 100 hour weeks, 4am assignments, setting my alarm for 0700 on a Sunday to study. I felt so time-poor, yet somehow if I really do think about it I still somehow managed to have no difficulty getting through all the Starcraft 1 campaigns, Grand Theft Auto games, Adult Swim and Jenna Jameson catalogues during those years.
90 minutes, 3 times a week is really not a big ask for training.
Not only that but it will synergise with your academia - help with stress and sleep, keep your mental discipline and timetables in check, and won't hurt on the college dating scene.
Any college student has my respect, I'm not saying it will be easy - but very do-able. And here is the bad news: after college life doesn't exactly get easier.