Answer:
well alchemy is a very complex type of science to learn. it take skill and a lot of practice. There are usually books stores sell like at barns and noble or borders. I personally reseantly got into this and let me tell you it takes time. humonculi are believed to be a little person in your head. Although the TV show "Full Metal Alchemist" (great show) humonculi are believed to be a different from what they tried to "rebirth".
Alchemy is understanding the structure and matter of something, breaking it down, and creating it into something else. In order to use alchemy, you need to use what's called a "Transmutation circle." Alchemy's first law of equivalent exchange is as follows: "Humankind cannot gain anything without first giving something in return. To obtain, something of equal value must be lost. That is alchemy's First Law of Equivalent Exchange." Even though we have all this information of alchemy, it has never been successfully done. Please, watch the show "Full Metal Alchemist" even if it's just the first episode, you'll get hooked.
Alchemy is basically getting to know what you're dealing with, breaking it down, and putting it back together in another form.