Its hard at first because of the amount of freedom you have. its hard for a week or two to learn how to handle free time, classes and studying. but after awhile you will work out a system that works for you. the hardest parts i found were knowing the limits of what you can do in a day. i started last year and found that i could procrastinate till a day before and still do well. that's not a good trait because sometimes you need more time tan just a an afternoon. learn to budget both time and money.
also try to make friends, i spent a whole year on a campus with 30 thousand people and didn't make a single friend all year. it was really hard because you get lonely. join a club or student group that interests you. its a good way to meet people. don't just hope for a good roommate... there a lot of jerks who skip there classes to sleep in and then drink when they went to all there classes in a because they needed it, yeah right i go to all my classes and don't drink. yeah just be wary of random roommates.
i find that you have some free time but unlike high school, there's a lot of information that you will need to find on your own in order to pass. so even tho you spend less time in the class room you still need to spend time studying and reading. i find that you must always pay attention in class because of the limited time you get. its not like high school where they spend three weeks on one subject. you need to
You don't get homework per say, you might get an assignment here or there but its most studying or reading a text book. you get big papers and tests but there planned out so far ahead you can a plan a way to handle them when they approach. its not terribly hard unless you have subjects your bad at, which are harder but not impossible. talking to the professor or TA can be very helpful and there are probably resources in the library.
college over all isn't super hard if you know what your doing, which hopefully you will have an idea of in the first month or so. being by yourself is a big adjustment and being home sick is ok, it happens to almost everyone. it may seem like a lot at first but it really isn't. you will find what you like and what you don't and soon you will be bored of it. its a big step when you can decide what you do and when.
but don't thrust me, i just passed my first year of college and i cant even spell university correctly without spell check. it's a miracle i got in. if me a procrastinator with ADHD, anxiety and depression can pass then most people will. it may seem scary but it really isn't. you just need remember to cheer for the right football team.