My hair is naturally reddish brown, moreso in the summer, but I started with the dye in 8th, and have been going strong since. For some reason, when mine grows out, it looks like I purposely streaked it (seriously, I get compliments on the color). I'm anywhere from auburn to copper and I love it.
OH, I had gotten this Aussie conditioner from Drug Emporium YEARS ago before they went out of business. It was made for people with red hair, and it enhanced the red in between dyes (the actual conditioner was red, it had some dye in it). I LOVED it, people always thought I re-dyed my hair every week, it made it VERY vibrant, but I can't find it anymore
But for you, try something semi-permanent or a rinse first to make sure you like it!