Hello, welcome to the forum.
1. Is is alright to eat low glycemic fruit on the starting phase of the eating plan
Not unless your intention is to continue feeding the Candida.
2. Is is alright to drink or use apple cidar vinegar?
Yes it is. Try to find Bragg’s ACV.
3. Is it alright to eat fermented foods?
Kombucha, “real” sauerkraut, and kefir are fine on the diet and will even help your progress.