Community medical question

Sir in the above I had clicked no in family history which might I didnt get correct meaning i did it bcz I dont know about my grandparents head condition but yeah my dad is half balded means ha have hairs in the head frontal areas and more hairs slightly behind front part but not dense hairs ..my condition is that I have dandruff in my hairs I m 21 still there is heirs a lot but sides are slightly Bald and hairs are thin overall and want to keep the present and regrow new also want to strengthen the existed one so of you could help in that regard will be very thankful sir ..