I hope this doesn't sound too harsh, but I've seen several posts like this. I'm someone who has done some serious damage to myself through cutting over the last eight years and it's frustrating to see people without an addiction/issue with self harm seeking one. I'm so sorry because you're clearly in a lot of pain and I don't want to throw around the "don't you know hurting yourself is bad" bullshit on this forum, of all places, but really. Just don't. Especially if it's something you're actively trying to force yourself to do.
People use self harm as a coping mechanism. If you find it difficult, can't handle the pain, or it isn't "working", that's normal and a hell of a lot more healthy than the other way around.
I worry about posts like these. You should be "chickening out" of self harm, and seeing people give advice for cutting (not aftercare or medical help) makes me really sick. I know suicide and self harm are very connected, but suicide and the right to die is not the same thing as kickstarting your cutting hobby. Again, I'm sorry if that's insensitive to say, I'm not sure if I'm phrasing this well. My heart really does go out to you. I hope you're able to find a different coping mechanism that actually works for you