I typed a short letter stating I was resigning. I gave a brief explanation as to why, and put down the last day I’d be working (so that they don’t schedule you after your last day, and you have everything in writing). I printed mine and put it in an envelope and then gave it to my manager. Do it as soon as you can, because the relief I felt after turning my letter in was amazing. I have two shifts left, so I can see the light at the end of the tunnel 😅 Good luck <33!!