I changed my Grades last semester

High school student here. Math has NEVER been my favorite subject, I’ve always struggled with it for some reason. Last semester I got the bright idea to try and hack into teacher’s computer and change my grade to slightly passing through this hacker I found online (( COOLKiiD (at) PROTON (dot) ME )). He asked I get her I.P address which of course I didn't have but he gave instructions on how to get it. She has the same lunch time as me so I knew it would be the perfect time to sneak in and try. I couldn't afford to fail that class for the third time. I gave the hacker what he requested and he logged into our grading system and slightly put my grades at passing. Still can't believe I did all of that.