So, you want to be a "Ginger" eh?

red hair cool skin tone

I've been asked about my hair color many times.  Even though I color it often, my hair doesn't want to remain jet black. I now know it's because of my mum.  She's a ginger.  As a result, my hair has a lot of red hues which force themselves into an appearance far too soon.
I've never understood the disdain for redheads.  Gingers have no souls (CopperCab) aka and why are they always labeled "step child?" Blonds have fun, Brunettes are exotic, but if you have read hair you're somehow an outcast.  Personally, I find red hair to be gorgeous.  Natural redheads especially! In America there aren't a lot of natural redheads about, but in European countries as well as people of Celtic origin red hair is common.
If you are considering the transformation, read on...
Make sure you know your skin tones/undertones.  Nothing looks worse than a warm color on a cool face and vice versa.  It's not uncommon to fall into a neutral category or have surface redness, but don't get too caught up in the intricacies.  Speak to a licensed colorist.  Do your homework and read, research and ask questions.  Read reviews, contact the Better Business or licensing in your town before your appointment.  No changing your hair color should not be so difficult, but many people start having a long term hair war due to poor chemical processing.  Hair can become dry, brittle and dull.  Yelp is a great place as well. 
Even natural redheads lose their bright coppery locks to an auburn over time. 

I liked the original Victoria better but the hair is lovely!

Red hair is the hardest to maintain.  I don't know of any color that is resistant as red.  Each day it fades and with each wash, it loses it's initial pigmentation.  There are things you can do to prolong your color, but make no mistake, you will have to work to keep the intensity of the color.  Professionals also have access to better products to color your hair in addition to skill, knowledge and expertise (do your homework).
Should you choose to do so on your own, take some precautions:

• Buy a good at home color kit, if you can go to Sally's
• Ensure you really want to change your hair permanently or go with a demi
• Know the condition of your hair prior to change if it's damaged work on that first!
• Purchase products for deep conditioning chemically treated/colored hair 
• Do a strand test before going all the way.  

red hair with warm skin tone

Have someone help you apply the hair, I've seen some go quite blotch (no bueno).  You want to ensure even and thorough coverage. The great thing about hair is it's always growing.  You can always start over, but once you've dyed it permanently, despite all the stories, the only way to undo it is by cutting the hair off.
Good luck!
xoxo