I started very young, then a few years back and a monster crash during race practice at whistler which put me in a wheelchair. It was 2 years before I could ride again and no my wedding veg sucks up into my body at the sight of a road gap. Its been a long summer of slowly building back up the confidence to hit jumps at speed but I'm getting there. So next tyear I am aiming for to be flying again. Year after racing again.
It does matter what age you are its just a matter of slowly building up to bigger and therefore faster jumps. get some good protective gear and keep hitting the jumps it wont take long before your flying, and then you can start tricking stuff.
North shore is all balance so practice track standing without using your brakes. Ride along keeping your wheels between the yellow lines or on the top of curb stones, also try and ride slow and fast. again its all confidence when you are going to try some shore stuff under no circumstances think you will fail if you do you will hesitate and thats when you'll fall off, its the same with a jump. Just go for it if you stack so be it get up dust yourself down, stop the bleeding and go do it again.
Over summer I stacked so often I went through three sets of body armour, two bikes, 120 stitches, and 100's of pain killers but so what its the price you pay to get airborne and silly.