Advice Needed: Which reef(s)?

[DiveExtreme22]

I am going to Occidental Grand in Coz for the week of 10-16 to 10-23.
Will only be doing a couple of dives, and intend to start with a shallow dive first.
As I have only been down on Tormentos reef and Chakanab on a prior trip, I am unfamiliar with what to request. I will do a deeper dive on my second dive (it has been 14 months since my last dive).

Any suggestions? Also, is the on-site dive operation decent? On my last trip to Coz, the divemaster from an in-town operation was downright negligent. Because it has been so long since my last dive I would feel more comfortable with at least a little supervision at first.

across the way in pdc there are good dive sites...tortugas reef, los arcos...ive never been to coz so idk if its worth it to go all the way to pdc though