Come on you can do it! Start with walking 10 or 15 minutes each day. It's so easy to build up your endurance and put in a show. The time goes by fast. As it gets easier, you add other exercise in as well. Strength training a few times a week will really help to reshape your body for Mexico. Jillian Michaels has a "Beginner Shred" and it's really great for beginners. Good luck!