scared. planning to henna for first time. Advice for very dark hair
I have never colored my hair. I am 40. My hair is very dark brown, almost black. Some people call it black, but it's really dark brown. I'm starting to go gray, and with such dark hair, those hairs stand out like a beacon! I am transitioning to a no chemical cosmetics life. I make my own soaps, lotions, shampoos, conditioners, deodorant, etc. So, I certainly don't want to use the dangerous hair dyes. Plus, I want the conditioning that is said to come with henna use as natural shampoos and conditioners tend to make my hair less sleek, probably because I don't use the silicone-based smoothening agent anymore.
This is my dilemma:
1) I love my natural hair color. But, I'm also curious about what I would look like with reddish hair. With such dark hair, am I correct in assuming that henna would only produce a warm, maybe burgundy effect in my hair, while the white hairs would be bright red?
2) If I did want a slightly lighter auburn than burgundy, how would I accomplish that?
3) If I started with henna, could I dry and style my hair first before then applying indigo if I decided that I didn't like the henna?
4) If I did do that, would the 2nd application (after henna) be indigo + henna mixed to accomplish very dark brown (rather than straight indigo...which would produce jet black, correct?)
thank you for the help!