You have to be serious on stopping. I'm glad you want to :). Hide your blades, talk to someone, and when you feel like cutting pinch yourself or something like that. Do things that will distract you from cutting. Stay strong and good luck <3!
When you cut, you then a lot of scars and it can stay on your skin permanently. So convince yourself that If you keep cutting, you'll have permanent scars. Well do what you like to do and talk about it to a close friend. Stay strong <3