a mangaka
As with all kinds of art/literature, what makes a manga "great" changes with the reader. What one person may love about a manga, another may hate. However, when asked what they like about a particular manga, many people would point to interesting characters, stories, and art styles.
If you are referring to manga artwork, Manga Studio is probably what you are looking for.
they are called manga like in English.
the lady who makes the manga died
There are a lot of anime series on manga fox. One of the mangas that are readily available and for free is called One Outs. So a person can read them there.
It is called "manga." There has been no "'pronunciation' translation" to English, at least as of yet.
I believe that it is only an anime, not a manga.
Manga. The full name is Warriors Manga.
It exsists in the sense there is a show and manga book called Deathnote. But you can not kill a person by writing their name in a notebook.
If the manga is about the artist of the manga itself, (Say, if Artist A were to make a comic called "The Life of Artist A".) it would be an autobiographical manga. The manga is about another artist, (Say, Artist A makes a comic about Artist B.) it would be a biographical manga. If the manga is about a fictional manga artist, then it would depend on what genre the manga was. Drama, comedy, etc.
There is a manga called Koko ni iru yo
it's because manga is a Japanese word that means "Japanese comics".