When do red marks from acne start fading?

I have been on accutane for 5 months I’m going onto 6. I understand my skin is more sensitive and I use moisturizer a lot. I don’t have too much acne anymore but I have a lot of noninflammatory red marks from where the acne used to be. Does someone know how long it will take formy skin to balance? And also if anyone knows and tips or tricks to make the process go faster I would love to know. I also would love it if someone told me what not to do such as go in the sun.