How to Build a New Shut Down Habit

i am an assistant coach for my son's middle school soker team. My wife kind of talked me into this because i knew they had a need for an assistant coach. Practices are 25 minutes away and the hair three nights a week, one of which absolutely never works for me. So when it was brought up that there needs to be an assistant coach on the right away, im mlike that would be really fun. But i divn't think it was an option because i was only going o be there about 50%. And i told him soon as he called, i also hears the deal. I would love to help out. It's been going on for the last couple of weeks