I believe they call them, root words in English, but there are similar characters like that in Japanese. There are textbooks that will start you with the basic characters you need to learn to be able to read more advanced ones with ease.

[When Yasei mentions that it he will have to write the hiragana for a lot of kanji, he isn't wrong, but it's a way to learn.]

At first, but over time you won't need to do it. This method is strictly for kanji that you are unfamiliar with, and once you remember them, you won't need to use the hiragana.