Well that's pretty normal, My brother who's currently a College student is stressed all the time, However he still can study, prepare for Tests and save some free time, Well i will tell you what he does, He usually comes home, Eat, Go to his room and start studying, Now he studies for 1 hour then take a break for about 20 minutes, Drink something, Later he studies for another hour, Take another break, Well and the same repeats for about 4 times, And the results are obviously high.
After he understand everything, He stands up and go out for a drive (You know to cheer a little bit), And then he does something crazy as usual and well, Here.. He spent about free 3 hours of his time, Now he goes home and sleep.
So yeah that's pretty him, A college student (3rd year).
Also you should take it easy, College is for your own good, You are going to get a Diploma in the end, And it will absolutely help you with your Career.
Good luck

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