The root of this question is: who are you? Are you an adult who should be making his own decisions or are you someone who needs his mother to decide things for him? If you're the second, then go to Florida and work for Mum. If you're your own man, then do what
you want to, whatever that might turn out to be.
If you like the idea of living and working in Florida, then off you go. But be clear in your mind that you're doing that
because you want to. And if you decide to stay in the UK and go for cabin crew, then - again - be clear it's because you want to. Do not be swayed by anyone's opinions but your own. It's your life, my friend, no-one else's. You have to live with your decision, no-one else does. That's what matters. And once you've decided, then go with it, keep with it with no regrets.
Good luck