Caca Rouge Henna over Recently Bleached Hair

Hi there. I have always really wanted ginger hair, and have been to the salon three times(over the course of a year), only to have it an odd, brownish color. Hence, I've decided to try doing it myself and came across Lush's Caca Rouge and the results in the reviews were beautiful *loveeyes*. However, after doing some research the color I am hoping to achieve through henna can only be done with a blonde base(actually, close to my natural color which is dirty blonde). It seems as though I would have to lighten my hair a couple levels(not a lot, maybe 2-3 levels) and the only way to do that is with bleach. I have also heard that henna over recently bleached hair could turn green, but all the examples given were those who bleached from a dark brown to a pale blonde. Could the process I am proposing work, or should I try something else? I am kind of scared 😮 . Thank you for any and all advice 🙂

I am not sure if this helps but my hair color now is close to this:

My desired result is close to this:

or

(I know, not the most realistic but I am hoping for something close)