I am glad that you know a bit about fasting and that you've set good parameters for the fast.
Now I do not want to discourage you, however, your scar on your face may not go away in one fast. The healing of stretch marks and scars take the back burner when fasting with other toxic loads your body has to take care of, your body takes care of all other toxins before it heals scars.
It also depends how long the scar has been there.
So do fast, you will definitely lose weight and meet most of your goals.
You may want to look into Liver Flush, which helps your skin and penile errections. Also for that you should eat beets everyday.