You have now booked your diving holiday after preparing with a lot of training in the local pool it will prove worth going through the training. It will allow you to enjoy the trip a whole lot more and give you more confidence when entering an ocean for the first time and enjoying the ultimate of trips on earth.
Learning basic first aid skills will also help your trip, whilst it is unlikely any accidents will occur, it is best to be prepared. Never worry that something could happen and deal with a situation should it arise.
Listen to all safety procedures from instructors and you will be fine, have fun and remember to take plenty of pictures of your big day, it is something you will want to remember forever.