Lots of wingers learn on one type of foil and later switch to different types and often brands. As a beginner with your weight and not a lot of wind, you'll be looking for something around 2000 square centimeters area, like a used Slingshot 84 or 99. Most people move on to different brands once they get better, but Slingshot can be a good option to start if you can get one at a good price. If you want to buy a brand where you can re-use parts later when you upgrade to more advanced foils, Axis is a good option. But the used market for Axis foils in the US seems to be pretty small, and you might end up replacing most components when switching to faster/turnier foils later.
Your best bet might be to take some lessons with North Beach Windsurfing at St Pete beach (
www.nbwindsurfing.com/wing-foiling-lessons.htm), and have them supply the foil (and perhaps a bigger board for the first couple of lessons). You may be able to try foils that they also sell, or that are available used in store or private in the area.