Any tips for covering blemishes/scars?

Due to me having my having my graduation ceremony in 2 days and being super nervous I picked my the skin on my face really badly. (I know it sucks so bad) I really want to look pretty on the day and have bought a beautiful dress to wear! I just hate the way how my face looks currently and feel super ashamed..

Any tips for covering up the blemished with make-up or other things?