Whipembricks

This is my 10th time downloading second life. I am about too just quit second life for good. Mostly because I dont understand how to customize my avatar. I have watched several youtube videos. Ive been on almost every website and page with instructtions. But I still dont get it!. It makes no sense too me what so ever on how do I make a black avatar too my liking. All I know is how to move and that is pretty much it.