I can try, hope this helps. First off, I assume you're lying down. Open up the diaper, fold it all the way out, wings out and everything so it's all stretched on the floor or wherever you're changing. Put your butt down in the center and adjust so that when you lie down, the back waistband is at your waist. Pull the front up to your waist, which should be right around your belly button (may vary slightly depending on your size relative to the diaper size).
Now pick a side, let's say left side first. Smooth the left front wing down and snug against your skin, pull up the back left wing over the front left, pull gently so it's snug, and then tape the bottom tape to the panel. Try for a slight angle, not perfectly horizontal, the fit should feel snug around your leg. Now tape the top tape, pulling gently to make it snug as well, again aim for a slight angle, so the tapes sort of make an X. Then do the other side, right in our example. Smooth the front right wing snug against your skin, pull up the back right wing over it, tape the bottom tape so it's snug around the leg, then the top tape so it's snug around the waist. And you're done.