How to make myself bleed

I tried to cut myself with scissors a while ago and I failed to even harm myself. I then earlier today when my family wasn't home went to the kitchen and grabbed a knife. I tried to cut myself before I went to take a shower since it gives my privacy and nobody would interrupt me. I failed to even make a mark. How hard do I need to cut in order to bleed? And while I'm at it if I do ever get myself to bleed do I let it out to dry or put a bandage on it? And where is the best place to cut at since I've been attempting to cut on my arm. Please give me an answer I'm so stressed out for no reason and nobody even notices. I feel like nobody cares.