Hi Marni,
You can fly, you just need to carry a kite which is matched to your bodyweight for the conditions of the day.
Secondly, you need to have good timing and good technique. Practice, get a few tips from someone who can really boost and maybe even look for alternative kites that may suit your requirements better. Technnique and timing are 80% of it, add some strong wind and courage is another 10% and then a good kite can make the last bit.
You can fly, go you big boy!
Good winds,