I recommend two books to you: " Reborn Japanese Comics " and " The Nine-Tailed Fox Fairy who Transformed and Traversed the Other World." " Writing Manga in Rebirth in Japan " was a light novel, a fantasy novel. The main character was a mangaka in his previous life. After his rebirth, he wanted to write manga in Japan, but the system gave him a strange mission. " Transformed Nine-Tailed Fox Fairy " was a light novel, a derivative of Doujinshi. The main character was an otaku who was reborn as a nine-tailed fox otaku and started writing manga. I hope you will like these two novels of rebirth and manga.