def go for cork 7 first , once you have that down your air sense will be so much greater as well as your confidence and corks threes and 5s will come soon after. at least that was my experience. a real cork 3 of a good size jump is no slouch trick.takes way more air sense etc. spin seven drop that shoulder and reach for safety or mute or tail. i learned my cork 7s with tail grabs, seemed to put me off axis much easier, just make sure your letting go of your grab and spotting for the landing when your comming round past 540. good luck