INFO:
To get started in the world of parkour, get in shape by doing push-ups, sit-ups, and pull-ups. Learn standard moves like jumping, climbing, vaulting over objects, landing on the front part of your feet, and rolling. Make sure to practice at least 2 or 3 times a week to maintain your basic skills and figure out what movements work best for you. When you feel comfortable, try free running through actual places, beginning with safe, mostly flat areas.
Video: How to Get Started in Parkour or Free Running - wikiHow