As I see it to coach others you need a high level of riding competence yourself. If the people you choose have that then you should get something from it, if not then all you'll get is ripped off.
From personal experience I can tell you the following – If your mates are at the same level as you, you will learn nothing but probably have good fun. If your mates are elite (national) level riders you will learn an awful lot, and if your mates or your tutor have competed on an international level you'll be amazed at what you pick up just watching them.
Having the skills and communicating/analyzing/teaching aren't the same thing but imo the more skilled your tutor, the more you'll learn and be inspired.