Try using temporary hair color first to experiment with different looks until you find the one you like best.
Know that very unnatural hair colors may be prohibited by school or work dress codes. Find a way to restyle your hair to hide the color if necessary.

You can use a good conditioner and proper hair products to keep hair healthy. Also you can use hair dye and other coloring techniques can cause dry, damaged hair that will be more difficult to style and may not hold hair color as well.