I want to die my hair golden blonde but how?

Well i have Brown hair. But yes most likely you will have to bleach it. Usually what i do is Buy peroxide and bleaching powder you should mix the bleaching powder and peroxide until it makes a watery paste. Then using gloves and a flat brush apply it to your hair one little section at a time. leave it in until your hair gets lighter, if you are not sure wash it out. After that shampoo it. Be sure to keep away from chlorine as it makes your hair green, probably to keep that from happening you can use neutralizing shampoo.