Lab 2a

Hello! I recently finished my 2a/2b lab, and I received a super low grade because I missed a step in a previous lab (1b steps 1-4). Unfortunately, the mistake seems super complicated to correct and I have no idea how to fix my mistake and go back and fix everything in return. I am super frustrated because I tried deleting the initial "pitch" but everything is connected to the one I'm trying to delete. I know I'm not supposed to delete my account but I have no idea how to correct and move on to get a better grade.