At this stage, the orientation of your paper doesn’t matter, but you want to make sure that you are making a valley fold. When you unfold the paper the crease should look like the bottom of a valley

You should now have two creases in your paper when it lays flat, creating a cross in the center.

Your folds won’t reach the horizontal crease. Think of it like you’re folding a paper airplane.

If done correctly, you should now have a trapezoid shape with a long, flat bottom, and a smaller flat top to it.

If you’re having trouble getting this to work, try tugging the innermost flap out a tiny bit. To re-use the banger, just gently push the paper back in. You might need to experiment with the positioning of the flap.