I'm a big Blue Hole fan, however, I stand with the others. I believe it is not for novice divers.
If you had told me that you had 50 dives (within a year or so) and were going to be diving a minimum of 2 dives a day for the week and that some of those dives would be deeper than 80' . . *before* going to the Blue Hole, then I'd have encouraged you to go.
For clarity, I stand with the others here and recommend that you do not go to the Blue Hole this trip. You may hear differently, once you are on the island, but please try and resist the sales job. For the time and money, you just aren't ready to enjoy it as it should be enjoyed, and flatly, you don't have the diving experience to ensure that you will make this dive safely.