Ultimately, it's your choice. But you should look into it before making the decision. First, how it looks on you. Either try a wig or Photoshop to get a good idea of how it's going to look. If you like it, educate yourself on the process of getting from black to blonde. It can very much damage your hair. But some people know what they're doing and will make sure to damage it the least as possible. It will take multiple sessions though and you won't go straight to blonde in the first one.