[clairity]

yes, coaching (and teaching in general) has great bang for the buck and tends to return as much as you give. it helps to have a good understanding of the subject (not necessarily expertise), but if not, in many cases, you can (re-)teach yourself the subject a little ahead of the students.

but the more important lessons come from learning how to manage a team. managing (much less leading) is hard. it develops your empathy muscles. it forces you to be nimble and creative. you'll feel a sense of failure and accomplishment at the same time. but children are so forgiving and watching them learn and grow fills you with a sense of pride (i volunteer coach basketball and i love it).

this sense of pride and self-esteem is a hidden benefit that not many people talk about since it seems so selfish, but it's real benefit to consider.