OK, so I went to my second class at Trapeze School New York (TSNY) in DC, and I continued to work on my knee-hangs. It was tough to learn another trick, since so much time elapsed between classes, but I continued to work on my timing for a catch.
I'm not "there" yet, but I did attempt being caught twice. I didn't reach my goal yet, but I'm definitely getting closer!
If you're curious about going and taking a class, maybe this will ease your fears. In this particular class, there was a family of 4 (i.e. mom, dad, and a young boy and young girl), a father and his daughter (i.e. the father was in town visiting and took his first class), two guys who bought a Groupon or Living Social deal, a girl who used to go more regularly (i.e. but has subsequently been working overseas), and me. We were a motley crew, but it was a great time!