I'm a male and long haired. i just want to know how to clean hair (details regarding shampooing, conditioning, any other caring habits) for healthy hair like how often should i wash or clean. very very light dandruff i have too.

AntiDandruff shampoo: Dandruff (seborrhea) is a common thing. Anti-dandruff shampoos with zinc, salicylic acid, or selenium are sold in many stores... and usually used twice a week. Prevent dryness (don't wash hair too often). Using a conditioner helps hair also, as well as avoiding hot blow dryers. A primary doctor or dermatologist can help if more worries about hair or scalp.