Should I buy a wig or dye my hair?

I am currently thinking about getting a wig but would like everyone’s opinions first. I have tried dyeing my hair a darker shade of brown but alas it really did not do much. Now its back to its regular shade. I am about to start high school in the fall and I want a new look. Something that really is me and that looks really good. I was thinking maybe a wig but I don’t know how’d they work for me, the price, and if they fall off easy. If I get one I want it to be realistic not fake. Has anyone ever done this and what are your suggestions?