Go to the hairdresser and get it done professionally. It may be a bit more expensive but you are guaranteed a decent result and if you do it yourself and mess it up you'll have to pay a hairdresser to sort it out anyway!
Hi megan i agree with Chazza my daughter has had a few disasters with her hair, it never turned out correctly .
She went to the hair dresser and they maid a good job of her hair.
good luck love megan07