The first thing to learn is picking a line and NOT staring down at your front tire or the trail directly in front of you. Learn all the tricks by practice and doing repeatedly until they become 2nd nature. Bunny hopping is only one of many. Just the fact that you realize mountain biking isn't the same as gravel or trail riding puts you lightyears ahead of most. Oh, and keep your toes up. It'll feel awkward at first but it will save you from flying off the bike and/or many sore ankles down the road (or mountain). Good luck.