If you're brand new to parkour, I might save those big, flashy, stunt like moves for when you are more advanced. Make sure you've got the basics down first, such as knowing how to land and roll. Learn them, learn them, learn them.
I never thought I might say this, but I might agree with a certain individual on these forums regarding first-time gym visits, albeit for slightly different reasons. I probably would not go straight to a gym right away if you're so new. I'd go outside to one's locales first and see if there's any potential obstacle you can do something on, no matter how bad your outdoor spots seem. At least this promotes exploration, as well as body awareness, and awareness of your surroundings. Then I guess you can go to a gym for more variety or instruction if your outdoor spots are really insufficient (like mine).
I'm not saying that you should never go to a facility for parkour, but rather, that it does not always have to be your only option for training.