Unless you have a photographic memory, or like bad anatomy, always use reference. Photo or from life, all "good" artists do or did, until they have the confidence to start creating from their practiced memory, (if you pay attention, even great illustrators like Sean Murphy and Greg Capullo recycle the same facial features in most of their characters, and that's because they're working from practiced memory). It's subconscious. Take pictures of people. Talk a friend into taking pictures of you in poses you want to draw, it's only awkward at first. It's kind of like acting, it starts to get fun.
And thank you, my show did pretty well, and I'm very excited about that. My art isn't what people are used to seeing in galleries, so I had no idea how people would respond to it, if at all. I'm still processing and learning from it, and very excited about pushing forward!