What should I do to prevent my hairfall and increase hair growth? M24

I'm using Mamearth's Rosemary hairoil, Rosemary serum and rosemary shampoo everyday as instructed for more than 1month. Before I used man matters hair growth oil and shampoo, But doesn't see much change. What should I do now, should I upgrade my routine with Minoxidil?? PS: I'm from Northeast India and people told me the change of water is not good for some hair. Is it true?? I've heard men become more bald when you reach different area, because the water is not suitable for them. Ever since I came to Chennai in 2019, my hair keeps on decreasing. Now I'm staying in Bangalore but doesn't see much change.