Tea can be made in many different ways outside of the traditional green and black tea varieties people mostly drink. It can be infused with different flavors outside of the tea leaves, and sweeteners can be added to enhance the flavor.The culture of tea stretches back millennia, and the drink has been consumed by kings and peasants alike, and is today the most consumed beverage outside of water in the world.
I don't exactly know where you live, nor the tea culture in your country. But if you're interested in trying different varieties of tea, and finding out whether it's something for you, i recommend you go to a tea shop, or a dedicated tea-house and try various types of tea, and thus get a taste for it. I'm sure there's something for you our there.
Tea can be delicious, but tea of poor quality or one that is improperly brewed can really turn one off of tea. And from what you describe, as the tea you've tasted tasting like water, this may just be the case.