I had actually paid attention during my year of observing classes before actually taking the plunge myself. And that translated into some things flowing fairly naturally for me. I still had major issues with my self-esteem when it came to athletics. So I made a deal with Sensei-hubby. We would work together before class and at home, so I wouldn't end up having to do anything for the first time in front of anyone but him. Front snap kicks, roundhouse kicks, side kicks, punches, blocks, C-steps, progressives, simple combinations, the early kata. I learned them all in our private lessons before I learned them in class. Gradually our private workouts became fewer and farther apart. And before I realized it, I was doing things for the first time in class. And it didn't bother me. Somewhere along the way, my brain talked my emotional psyche into believing what I knew all along: nobody out there in the class is really paying any attention to how you look doing what you're doing - they are all too busy trying to keep themselves from looking ridiculous in front of the others. Once I embraced that reality, things got easier.
And then I became a green belt.