Hair Dye Tips Plz Help!?

Im going to be byinq soon light golden brown hair dye and i want to knw if its qoinq to change color on my hair because my hair is blck buht i dyed it kinda redish and its light knw .So do i have a chance that its going to come out how i want it?? Plz help && thnx ...&& No Rudeness :))