Manga is a surprisingly good textbook for those who are too lazy to study but are really up for learning Japanese. It’s like a picture book, easy to read, but with plot lines and characters that can compare to actual novels. It’s great to help you get used to reading Japanese and get used to Japanese speech as well. But only that. It should be used as a stepping stone to actual Japanese books.
We foreigners are actually really lucky because we get praised for being able to read Japanese manga, when Japanese students are scolded for reading too much manga. You all know what I mean.