Allie has good advice but Where you are staying has everything to do with it. Are you going to be staying on Caye Calker or Ambergris Caye. All the hotels offer it,most charge from 150. to 185. usd and credit that cost to the full certification if you decide to continue. Who to take it from should/will depend on if your a practical distance away.If you chose to do the PADI version of the discover SCUBA Diving (resort course) you will get internationally recognized credit towards your certification course.In other words the dive and pool session you do for the Resort Course will count as one of the pool and one of the dives you are required to do to get certified.where ever you end up be sure and get a log book record of your experience and remember it says 'Have Fun' 52 times in the book.

White Sands Dive Shop
https://whitesandsdiveshop.com/