Looking for Friends who work in schools or similar

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I need Friends with similar lifestyles. I work in a school so sit down for about half the day. I can't use lunch time to exercise as we are supposed to watch the students. :|
I rarely get to 10000 steps in a day. so would like to do challenges with people of a similar activity level.
Saying all that, I'm not actually sure how challenges work so would need to match up with Friends who do know.
Thanks. :)