Do not sell your self short your skills are very valuable.
Get a plan. What do they want to learn. How much time.
I would have this be introductory and if they want more they come to you for post grad training. YOu aren't going to make experts of them. NOt everyone will do this when they finish--YOu are introducing a service.
Be organized. YOu are ot selling a product for that you get a commission.
Go technique, go professional behavior. Sell your self as a pro for advanced education.
Send my cut to . . . .