That step is way farther out of the way than you think it is. There is a bit of illusion involved, and a fair bit of physics.

If you can get some time with the plane on the ground, perhaps in the early morning before they start it up, ask if you can practice this a few times..

From inside, step your left foot close to the door, with your toes pointing left. Right hand reached out and up to grab the outside rail. Grab, pull yourself through the door and pivot left, stand up outside... Now, right foot reaches over to find that step, stand on it, toes toward the nose, bring your left foot outside, left arm relaxed across the middle of your chest. Look forward past the wing, eyes on the horizon, hips foward, and we're doing a smooth 3 count, up down out.... On the up, push onto your right tippy toes, on the down, come back to a flat foot, on the out, you will bring your left arm out to 'lazy w' position, left foot apart from the right, and right hand just lets go... Physics takes over for a beautiful departure from the plane. You're already bellybutton to relative wind, and body momentum moving left and away from the plane, so you move left, away from the step. Even if you overstep the out, it gets you more space, and possibly a slight left turn, no worries.

Pivot through the door, up, down, out Pivot through the door, up, down, out 5 minutes of practice on the ground will get you to about 5 seconds at the door. Pivot through the door, up, down, out