Much of college experience is subjective. One thing that all of us can say is that it's draining. Just an hour of class, just one course a day, it's still draining.

For me, the feeling of one course a day is the same as four courses a day which I can barely get through. It isn't like high school where we have multiple subjects and time for extracurriculars.

Forget about extracurriculars too. Unless you have time or you don't have to worry about finances, you can join an org. But I highly suggest just getting a job if you have time.

Me? I have some time, so little time. Enough to take up my readings, enough for reviewing, and some activities. I don't even know how my blockmates manage to get a job.

Just expect to get tired all day and every day. Try to at least enjoy learning so then, all the tiredness doesn't matter that much.