I have the first step on making kombucha here.
I left the tea to ferment for two weeks. You can do one week if you like it less carbonated. Don't leave it longer than two weeks, or you'll have a mess on your hands when you pop the bottles open. How do I know, I did it once. It was a mess any time I'd open them, but man it tasted great.
You can put fresh fruit in the bottles, or blend it like a smoothie to put it in. I've done both, and prefer it blended. It doesn't matter what you use, just try and pair up like things. You only need 1/2 cup of smoothie like fruit.
I used mango, nectarine, peach, ginger, and cardamom. That's my favorite combination!
I put the fruit in with a funnel. Then I fill the bottles most of the way with the fermented tea. If you don't like the vinegar taste, just add more fruit.