How to convince parents for whey protein.(M16 68kg 5'9)

Pretty much the title,I started going to the gym 2 months before, but have been doing Calisthenics,Home workouts and MMA for last 2 years.Although I am non vegetarian,I struggle to hit my protein goal(Around 100g). Like typical Indian parents they have a fear around Whey protein. They don't even let me eat more than 3 eggs in a day,Today my father said he will get me Sattu powder and other dry fruit mix which is better than whey.😭😭How do I convincethem