I think if you spent a summer / a month / whatever just practising what you can do rather than trying to go bigger you'd start to lose some of the sketchiness.
Sketchiness goes with time on the bike and getting everything dialled before you move on to the next step. And riding natural will help lots, go to the rip rap infront of widewater lagoon or the splash walls ride that lot, you won't have the scope to be sketchy or you'll fall off.