What level do yo play & how many BB/hour do you average? If you've never coached before, start smaller to get experience and increase your rate as you become proven. I suggest to start by taking your winnings per hour and multiply by 1.5. Someone who has never done something wanting to charge $100/hour is a bit extreme imo. If you like it, and they appreciate it, you have good cause to charge more next time

If you already make $100/hour+ playing, then charge at least that or more for your time.

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If you feel you have a question, dont be lazy; make sure you have asked yourself first. Then search the forum, then just fucking google it to get as much detail as you can. You may then seek clarification on specific points from others.