Find a qualified coach or gymnastics instructor
Practice basic tumbling skills first
Warm up thoroughly
Use a proper mat or trampoline under supervision
Learn the takeoff, tuck, and landing positions separately
Start with spotting and assistance
Keep your core tight and chin neutral
Jump upward, not backward
Tuck quickly and rotate
Spot the landing as you open
Land with bent knees and balanced posture
Stop if you feel pain or lose control