How do I dye my black Hair red

It's actually more complicated than this. There is a lot of art as well as science to coloring hair. A lot of people recommend going to a salon for this reason.

Basically, you have to lighten your hair and then recolor it. Most hair dyes do this in one step. So, if you obtain a red hair dye, mix it with developer (either the developer it comes with or purchased separately) you can put it on your hair and it *might* get it to the red you want it to be.

I strongly recommend that you do a strand test first to make sure that what you get is what you want.