It's not hard, you just ring around. It's only 20 hours.
When I worked at the Y, I was the one who had the most students placed with them, because I didn't mind. I always offered them to come much more than the 20 hours if they wanted, I'd offer to train them, too - so they could go for long and be pushed hard enough to learn something, even if only what it was like to have a trainer. Very very few takers though. They knew everything already, of course. Okay then buddy, better go dust the treadmills.
Nobody's asked since I opened the garage gym. I think they just call the big gyms.