So...
Let's review the bidding: you are new to sailing and want to cross the entire Gulf of Mexico in MacGregor 26? The best advice I can give is to make sure your life and boat insurance are paid, you have a will, and have given someone power of attorney. I know, I know, lots of people have made successful voyages in small boats. But lots have not. The ones that made it had the right boats. This isn't a trip for a novice sailor in a daysailor suitable for rivers, lakes and bays. Get some serious experience under your belt first, in all kinds of weather. Take a few small trips of 100 miles or so. When you have developed some competence that you could deal with the worst happening, go out and buy a blue water boat. Then sail to Cancun. With the right boat and the experience, this will be a pleasant cruise. Without them, it will be a white knuckle event...