What can I have during my fasting period?

I’m working on my overeating and have been doing intermittent fasting usually 16:8. I was wondering if I can drink coffee (more specifically Folgers Hazelnut cream or Vanilla Biscotti flavored K-cups) with 2 tabelspoons of whipping cream during my fasting period? I also have been drinking loose leaf tea plain, but noticed that some of the tea ingredients have sugar or cane sugar listed as a 4th or 5th ingredient even though the nutrition label says 0cal 0sugar, would this still be ok during my fasting period? Also just wanted to clarify that brown rice and quinoa are ok to eat during my meals? Thanks!