Kanji are characters adopted from Chinese for writing Japanese. Together with Kanji, Hiragana and Katakana make up the Japanese writing system. In the beginning its really difficult to wrap your head around such a system especially coming from the western alphabet, however in time it will start to make sense. Kanji range from simple characters that are just one or a few strokes to complicated monstrosities that even native Japanese have trouble writing and remembering. Again I am no guru of the Japanese language but it makes sense to start with the easier characters and work yourself up doesn’t it?