Work a progression if your ride terrain allows, start with smaller hills or humps, then work up. Don't be afraid to bail or step off if it really goes wrong. Watch others go first, don't be first until your skills are best in riding group. Ride with people that will run to help you instead of laugh at you when you crash. Wear a helmet. Serious life injuries or death can occur, be honest with yourself on skill level, stay afraid or at least respect your machine, watch YouTube videos to see just how fast things can go wrong. Avoid liquid courage.