I am new to this, but as far as I know one can use any black, green or white tea. (I actually don't know what white tea is, I need to google it). I am not sure if herbal teas can be used, I will give it a go, once I have a few Scoby's.
(The people where I bought the Scoby, was actually only selling Kombucha and Kvass, but I asked them if they do sell Scoby's and they said they actually do and brought one for me the next week.) You should also try to make Kvass (the rye bread one), it is quite easy and very tasty and apparently also very healthy.
Let me know how you do, when you get round to it! I am pretty excited to hear! :)