Even if you can't draw you can still make good manga (for example one punch man and mob psycho 100) you can always practices and get better as well. There will be bumps in the road but I'm sure you can make it (๑•ㅂ•)و✧
Don't forget to do research as well :)
Did you know that Death Note was made by two people, not one? Tsugmi Ohba was the AUTHOR of Death Note, while Takeshi Obata was the ILLUSTRATOR. Ohba wrote all the AMAZING story in Death Note, while Obata made the stunning illustations. Really, if you want to make manga, but can't draw, I'd reccommend looking to collaborate with a willing artist.
Also, in terms of WRITING manga, PLEASE buy yourself a copy of Hirohiko Araki's "Manga in Theory and Practice: The Craft of Creating Manga". As an artist, it doesn't include very much help on DRAWING, but what few pages it has has elevated my art tremendously. Also, it explains the writing process of making manga amazinglyyy-
you are just a bearer of bad advice and recommendations, you know that, right?
(i'm kidding i'm kidding, goodness)
i am a clown; that would just be overkill
But I can't draw I can come up with some pretty good plots but can't make characters likeable don't know enough about what it take to make my own manga but it's one of those things i dream of /think of beside food (￣∇￣")