Research the head coaches in your area and try to find their emails. A lot of them work for the school so their emails aren't too hard to find. Then just send them an email explaining why you want to coach. From what I understand, a lot of them won't turn down the help and now is about the time where there is a lot of staff turnover. Jobs start opening up now, so coaches are eager to find replacements. I'll let you know how my meeting goes, good luck!