Well, try it out... if it doesn't work, you can always cut it off and or wait for it to grow out...
However, I will warn you, the more you do to your hair, which includes hair cuts, the faster you kill it. It's already dead, yes, this is true but, you want to keep the stuff you do to it, to a minimum... it only has so much life to grow back over and over through time
The main difference between your profile pic and the pics you've posted is that your skin tone is a lot paler. It looks like the shades of blonde you're going for are darker than your very blonde hair. I think it would still look good, but would work better if you had a slightly darker skin tone.
Yes, sweetie, the second pix looks very natural too... I think if you follow the directions on the box it will turn out this nice... however, your own natural hair is just as beautiful and with coloring it, you would have to do it every 6 weeks now. Good luck. xx