White tea is picked very young and brews to a golden color, green tea is young tea that is steamed and rolled (and if bagged then crushed) the flavor is sweet smoky and the color a yellow-green when brewed. Black tea is naturally fermented older leaves, and brews to the deep orange/black color. Different blends have different flavors. For example, Earl Grey is flavored with Bergamot, a small bitter citrus fruit, the dried rind is used. English Breakfast will reveal its floral nature with a bit of milk, Jasmin is black tea flavored with Jasmine flowers, etc.
Teas are quite wonderful and getting to know them is part of the enjoyment.
To properly brew tea, warm the pot, 1 teaspoon loose for each cup to be made, water rapidly boiling. If using a tea bag, much the same directions. steep 3-5 min for a nice cuppa, 1-2 min for a delicate cuppa.