As someone with significant skydiving experience, good luck doing any of these things your first time out of a plane. Chances are you'll end up on your back, spinning out of control. If you are lucky you'll end up on your belly, spinning out of control.
If you want to learn how to do any of these things, go to your local wind tunnel and practice. Without that practice, you should just enjoy the minute or so of spectacular views before you go splat.
Also, even with that experience, you'll probably go splat. Best case your aorta will disconnect and you'll bleed out after a few seconds. This is common even when people are stopped by the harness (e.g. by hitting trees). Human body just wasn't designed to accelerate (decelerate) that quickly.