I henna'd for the first time on Sunday. I have fine/medium strands and my hair is relaxed. Overall, I loved my first henna experience. It definitely made my hair feel super strong and thicker than its ever felt in my life!!!
The only problem I had to combat later that night was that my hair felt very dry. I have already been battling with trying to make sure my hair is moisturized so I panicked at how dry it felt. The good news about that is that if you use a thick moisturizing conditioner afterward and then apply lots of moisture and seal with oil for the next couple of days, you'll get softness back...at least that's what happened to me. You may not experience dryness at all. Be careful with the amount of ACV or lemon juice that you use. These two ingredients apparently help to release the color of henna. I used Jamila henna from hennaforhair.com. I mixed it with Amla, Indigo (because I don't want red hair), ACV, evoo, pectin.
Now, I read at least 70 pages of the henna thread plus I went to hennaforhair to find some recipes so I know you are anxious but you should probably dig into those areas of information. It'll make you feel comfortable in your selections.
Feel free to ask me any questions about my experience. Good luck!
I
henna!