nice! looks like you will be not far from where we stayed in our Villa - the Excursion people will listen to your plan and then set you up with the right tours.. Snorkel a full day was really great for us as we hit 4 different places - the first place let us spearfish! really cool experience that I would recommend.
Secret Beach is not to be missed - you just hang out for the day on the most incredible, still water ever -they have food and drinks and shade.. get there by 11 or so for the best photos... later in the afternoon the sun glare on the water doesn't show the true beauty.. they also have motorized water scooters, paddle boats, floating chairs, etc - it's really great - on the Lagoon side, north of where you are staying - golf cart to get there.
Excursions - Snorkel, and there's the Mayan Ruins stuff - we did that and Cave Tubing (think Comal River, but you float through Carlsbad Caverns - it's pitch black dark in there! - was fun) and Zip Line.. it's a full day but was neat.
Food - YES! So many options - Bluewater Grill was our favorite - right on the water - very american feel. We went to Caramba's where they have the seafood out front on a cart - you pick the fish you want (we chose Lion Fish) and they prepare it. Lots of options there but the chef to prepare your own food sounds really cool.
My Tour company was Belize Diamond - Norma is the owner - She came to our Villa, listened to what we want, made recommendations, and set everything up for us. I don't know any others but she was helpful and even picked us up and dropped us off in her Golf Cart which was really cool.
https://belize-diamond-adventures.business.site/Let me know if you have questions!