@kingshellie I’ve been in a very similar boat the last few years! A couple tips from my own experience:
If you can, either bring all your stuff (including breakfast) with you and get ready at the gym, OR do workouts that you can do at home (running, yoga, bodyweight, HIIT, gym stuff if you have or can acquire some equipment). Alternate between the two from day to day so you’re only going to the gym 2-3 times a week—it’ll keep you from getting bored and worn out from the extra work of prepping and packing a whole days worth of clothes, food, toiletries, etc. You’ll be amazed at how much time this ultimately saves you by not having to travel back and forth between your house and the gym before going to campus.
My other big tip is to make a workout schedule for each week, not just what you plan to do but for how much time and what specific exercises. If you don’t already do this, it will also help you cut down on wasted time procrastinating or deciding what to do. I do this the night before each workout but you could also plan it out on the weekends. This may not be as applicable to you if you know you just want to run on a treadmill every day, for instance, but I like to do a bunch of different activities including strength training, which requires some advance planning.