Your artwork is good, it just needs a little bit of development -- I would recommend working to improve the way the male characters look. You need to make their chins squarer and harder, with harder edges. You have already done a lot to ensure their faces are symmetrical, which I applaud you for. You will also need to cut back a little on the greyscaling. I know you're trying to imitate how manga often looks in print when you greyscale, but I think you're just doing a little too much, so I would recommend cutting back on it, just a bit.
I would also recommend having separate pages dedicated to the chapter titles, with each title being a brief overview of what is to come in each chapter, as with the Victorian literature of old, like so: "CHAPTER ONE. The Beginning of the Disaster - the cat - the collision - the hospital - the cracked phone - the underground base - the man in the jar - the hand penetrating the torso". Maybe decorate them with some kind of fancy leaf illustration. The chapter titles should also be within some kind of rectangle, like a plaque. You could, if you wanted, include a black background, but I would recommend a white one so that it won't damage the eyes of anyone reading late at night.
I also think your backgrounds could use a bit of work, such as the manner in which you drew the road in background to the frontways shot of page 1. You need to introduce more slanted lines to the road stripes, because, when you're creating an imaginary world, especially in a comic, you need to convince the reader that what they're seeing is believable. Any slip-up could pull a reader out of the world they're meant to be believing in.
I also commend you for not opening your comic with one of those overused exposition dumps they always have at the start of every comic on this platform. Even the more well-known ones open with them. I believe that a fictional setting in a comic, as with a novel, should slowly be introduced via context throughout the story. I have cited as a similar example to novitiates George Orwell's Nineteen Eighty Four, which opens thusly:
It was a bright, cold day in April and the clocks were striking thirteen.
We don't get given any more information about Oceanian society than we need, and we gradually find out more and more about the world of Big Brother, Miniluv, Minitrue and Newspeak as the novel goes on -- we don't get given everything in one go. Other examples I've cited in the past include Philip Pullman's Northern Lights, which opens with the line "Lyra and her daemon moved through the darkening Hall, taking care to keep to one side out of sight of the kitchen." The reader is left wondering, "What is a daemon? Why is it this girl's daemon, specifically?" However, as the novel goes on, we gradually find out more and more about this world, and about the factions of the Tatars, the panserbjorne, the Church and so on.
And, of course, it's the same here. We gradually find out about this strange world of weird alien creatures in tanks, psychic powers and so on. However, I would recommend, in the spirit of that, including a line of dialogue from a character which contains the name of the place in which the comic is set, such as "We're the best people in such-and-such-a-place!"
Please do not think I'm being rude to you - in fact I welcome you to Tapas and I wish you good luck in everything.
