Since I had the braids at the base of my skull, I found it easier to put the wig on starting from there. The braids help hold the wig so it doesn't try to slide right off as you stretch it over your head.
Optional: once the wig is on, you can use bobby pins or other hair clips to hold the wig on. Mine had a hook at the back I could use to tighten it.
Enjoy your ability to hide your long hair and wear a wig!