Heh. I guess I'll take a stab at explaining this. Just understand to most of us this is so mundane we've never had to spell out exactly what we're doing. First off, do you realize what orientation and permutation are? Do you know that PLL stands for permutation of the last layer? and that the last layer is typically comprised of OLL followed by PLL?
Assuming the answer to all prior questions is yes, I'll move on to understanding the diagrams of PLLs. As mentioned before the arrows show how the pieces are being moved around the cube. If an arrow is double sided, and points to two pieces, they must be
swapped. If an arrow is going from one piece to another, and is single sided, that piece is being
moved to that location.
Take
this example : the first case there is the H Perm. The arrows show that there are 2 sets of edges that need to be swapped. The bottom edge of the diagram is getting
swapped with the top one, and the right with the left. In other words the bottom
has to go to the top, or
belongs in the top position, and the right needs to go to the left, and vice versa. There are no arrows going to or from corners, so the corners are already in their correct location.
It sounds like you're trying to go straight into what we call full PLL, which is not a good idea. Have you ever solved the cube before? You should first learn and understand what we call 2 Look PLL, which divides PLL into two steps; solving edges, and solving corners. This requires far less algorithms and memorization. Full PLL, which is 21 algorithms, is something that you learn when you have a solid understanding of the cube, and are looking to get faster. I hope I helped. If I didn't, I'll kill you.
Edit: PS. While cheating isn't very obvious to noncubers and might impress more people, it's incredibly obvious to most people on the forum. You'll get little respect pulling stuff like that.