We have 1 or maybe two exams per week 1st year (usually only 1 especially 1st quarter). Usually you have 1-2 quizzes each week (but one is an OMM quiz that is really easy). You have free time for other things such as hobbies, working out, or going out, but that time is limited by your studies.
Do you have sufficient time to study for exams? Yes, but each person is different. Everything is doable. Anyone who says you don't have enough time is not studying right or not willing to study enough.
How do you handle being in class until 5:30 pm? I'm only a first year, but we have been in class until 5 only a few times. If you don't want to be in class that long, don't go and watch the lectures later. All the lectures are recorded except for OMM and you can watch them at 2x speed while pausing them when you need to.
Overall, I have enjoyed my experience at CCOM. For a DO school, they have a lot to offer. Their clinical rotations, from what I have heard, are excellent. Obviously, I haven't experienced them yet, but I have been told that they are very good, on par with most MD schools. Feel free to DM me with any other questions.