practice practice pracitce.
u wont be able to make a cork or other stuff at the first try.
try first to get momentum on the ground and how to use it, to jump.
if u got that then u can start make some trick or whatever in the air.
easy way to get momentum for a cork in the air is just to rotate the arms and chest in one way.
i mean if u want to rotate to the left side, move your right arm before u and the left arm behind u, meanwhile rotate the chest, and there u got. u spin to the left side.
i also would say, watch some cork, tricking etc. videos on youtube. to see how itīs made in real. and just try it that way in toribash. it will probably work.