Thai cooking is very different than modern western cooking. Where in western cooking (particularly baking) ingredients are measured exactly, Thai cooking is much more lenient. While this flexibility makes recipes more forgiving, internalizing "the system" can be challenging. This site provides measurements, but you should look at these recipes as the starting point for your exploration.

In Thai cooking there are four flavors: sour, sweet, creamy and salty. Heat sits on top of the four flavors. The secret of a good dish is the right balance of the flavors -- you will find that there are "sweet spots" where the flavor just tastes right.