When in DOUBT, Shut it DOWN!
Aside from that, I have made multiple (5-6 times I think) comics before I even got an appropriate job and they all went downhill.
Even with the fanfiction comic, I made that got so many views, comments, and likes I still dropped it.
Why? Because it is not what I wanted and also it's not the right website to publish my own comics (deviant art).
You have to find what you're passionate about. Is it history? Mythology? Real-life event? Horror? Sci-fi?
The reason why I make the current comic is that it is based on what I love, inspired by middle eastern history, mythology with a set of fantasy, worldbuilding, and lore.
If I'm ever in doubt, I go back to reading and listening to more histories and mythologies that inspire my comics. That doubt will go away, and it's back to making more pages.