I thought of booking into all inclusive resorts on Sunwing website but it might not the best apparently? If you have any places in mind in Mexico to get my certification, let me know. I'll definitely start looking into it. I'm very close to ask for a refund at my local diving shop.
I looked briefly at the Sunwing website. I didn’t see a way to filter for resorts with diving, whether included or nearby, but I might have missed it. Lots of the locations aren’t really places well known for scuba diving so if you really want to do a Sunwing package you’ll have to do some digging. Or maybe someone familiar can look at the list and have a suggestion. (I’m not too familiar with Mexico beyond what I read about Cozumel, and have only dove Sea of Cortez.)
AI resorts are a tricky thing for diving.
There are AIs dedicated to diving where you could certainly find a good class and get it done, do some additional non-training dives, and immerse yourself in the experience. They tend to be one offs and not part of chains or offered as charter package deals. And they’re in places with good diving.
Some AIs include diving, but are vacations with some diving, vs dive vacations. Sandals comes to mind, maybe club med, there are others. They can be good for new divers, and may offer certifications. (I think at some you can get a certification good only with their resorts, not what you want.)
(Experienced divers tend to not like diving with these because there are usually a lot of limitations on the diving. Sometimes people even stay at an AI for everything else but do their diving with an outside shop. But you might find one that works for you.)
And many AIs are not useful for diving at all. Like located someplace where there isn’t any decent accessible diving.