LOL, you described 3 of the most non-toursity dive sites at Cozumel, the only one you left out was Maricibo. LOL
All 3 of those sites are considered advanced dives. If a guy like newdiver777 ends up at any one of them he'll be very lucky, (or maybe unlucky) cause he will have to show some real substantial dive skills to be allowed to dive them, or he's diving with a really reckless dive op.
Newdiver777 - Cozumel's one of the most consistant above average dive site destinations you can go to. You having never been there and only being there for 2 days, it's really limiting what you will be able to do and see, however unless your dive op keeps taking you to the C-53 wreck for 4 dives in a row over 2 days, you will have little chance of having a bad dive experience.
The dive profile Cozumel dive ops use there is a deep 1st dive which is almost always multi-level and then after a surface interval a shallower 2nd dive. That's pretty much the dive experience day in and day out. The 1st deep dive usually shows you some spectacular formations and the 2nd shallower dive usually shows you some great sea life.
You'll have a blast. Pick a high quality dive op for the most bang for your buck, cheap dive ops will work against you making the most of your time.