Redyeing Hair?

I have a problem. Since I was 19 I have dyed my hair some kind of honey blonde. Then I get bored and dyed it a light brown or just brown. Actually I just wanted the lightest brown they had, like a sandy color, to no avail.

Now I am in my 50s and some months ago I put in the golden blonde in my hair again, it slims my face, I have a round shaped head. My son said my hair was actually more red and orange than golden blonde. So feeling like a head light I got the light golden brown Loreal and put it over the red, orange blonde hair. Well it's brown now. my son says "just brown". Then I saw the new Crème of Nature Light Carmel brown 9.2 it has argan oil in it. I love that color! I want that color, it's perfect. I am afraid of what the underlying colors will do to this color.

Can someone help me out please? I was also thinking about using that Color Oops on my hair, but I am afraid. The new color above has not reached this country yet. It's still in Canada and on Walmart.com. It's $5.78 but with the tax and shipping came out to $10.97. And it takes four days to get here. The Canadian company charges $9.97 plus tax. So if I mess up I will have to wait another week to show my face outside. Can anyone help?