I thought your jokes were cute and it's a good start. Since JWs are probably what you're most familiar with, it makes sense to write comedy about that but I'm sure you'll branch out into other subjects. Good luck with your course. And I admire your bravery. The thought of doing stand-up comedy is terrifying. Talk about making yourself vulnerable! Good on you.
Yes, it is funny that despite the 130 years of marketing, most of the world knows very little about JWs, or cares to. I've done my bit to fill in the blanks for people whenever the subject has come up - very rarely, as I don't deliberately bring it up. I like to inform them about the shunning and breakup of families, the hiding of pedophiles and the fact that refusing blood transfusions is through coercion more than blind faith for most. Just doing my bit, being helpful and all ;-)