15 yr old daughter

I am a solo mother of 7 very strong willed children. I have tried a number of times to be diligent with teaching TSG but I often resort back to old habits.
I know I should not be, but I'm afraid of my 15yr old daughter. She is strongly red on the Color Code and I am blue.
I'm afraid to make her angry. I don't like what she says and I don't like her being angry at her 6 younger siblings. She shouts and yells alot (to be fair, I used to too, but I have made a big improvement on my behaviour since starting TSG, but I'm not perfect yet)
I have not yet done a Rule of 3 on her or a 24 loss of privileges. I am afraid of the repercussions.
I have not yet figured out how to follow through with her on a 24 hr loss of privileges, when I have six others to do corrections and follow through with too.

Wanting to try again, with the Lord's help and yours too. Thankyou