As a trainer, even if you can't skate well at your kid's age, we still need guys to pass the puck during drills, be a presence to keep the kids present and engaged.
Kids do well when their parents are involved in any capacity, even if it's being the jersey guy, or the guy that helps the goalies get dressed, whatever it may be. Take the course on being a trainer/first aid in case of an accident, be the guy that carries the water bottles for the kids to the benches.
You're on the right mindset in wanting to help, this is a great start.