How to cure Grade 3 fatty liver at home.

Hello doctor,I hv jaundice 1 yr back due to contaminated water in my college.but few days before I fill little discomfort in my right abdomen so I decided to do a routine check up .from the blood report in cbc my  lymphocytes is 42% n in lft sgot/pt is 44/47 . After I met with A Hepatologyist he prescribed few test like Fibroscan, ultrasound, lipid profile n Hbc1 .lipid profile n hbc1 are normal also Hepatitis b n c are negative but in fibroscan Stiffness is 7.4 kpa and cap value is 307 .n in ultrasound it shows mild fatty liver (NAFLD).now my Hepatologyist prescribed No medicine only hv to do exercise for 6 months also no restriction in my food.now I have one spider vain on my knee may be for heavy exercise.i never drunk alcohol n never smoked till now .only I eat more junk food daily in my past.what I should do now plz help ?