What do you feel strongly about? what envokes a huge response in you? What makes you sit up and think about something? what do you stop everything to do? What makes you passionate?
My point is that you may be "good" at lots of things, you may be "good" at few, but you will only really feel like you're working towards something if you feel passionate about it. work out what you enjoy, what's gives you life satisfaction, then work out from there what you can do.
If you say you like sports - is that just something that you enjoy, or is it something that you wouldn't be able to live without?
you might feel like you're not ready to teach - that doesn't mean that you can't or won't develop these skills, in the meantime, there are jobs you can get at leisure centres where you can see coaches in action and pick up on some tips and tricks they use.