I'm not a comic artist but I am an artist and I read a lot of comics daily. So while I can't advise you from the same perspective that a comic artist like Whispwill could, what I can tell you is what will decide me on subscribing to a comic if it's in one of the genres that I read.
First off we'll start with your comic's description. It's important not to be lazy with that as I and a lot of other readers tend to make an initial judgement on whether we want to read something based simply on that. It's essentially like the description on the back of a paperback book. You can often tell how decent of a writer someone might be on that alone. I liked yours. It's fun and throws a mystery at you in 2 short paragraphs. Simple fast read without a bunch of grammatical issues.
Next up is the artwork. While the sketchier look of the black and white artwork and the use of handwritten speech bubbles in some pages (thank you for changing that in later pages) make for a rougher comic visually and that may turn off some people, I subscribed to your comic because in 6 pages you had me invested in the main character. It was your writing of the conversation between the main character Ash and the people whom he was helping in the store that hooked me. There was no large info dump, you didn't even need the character card for me to learn that he liked the people and place enough to volunteer there often, he has a stubborn streak, a big heart, and has an important someone named Anna waiting for him at home. Already 3 people who are going to be upset if our big loveable lug of an M. C. dies. Again all of this in less than 10 pages. If I was trying to decide if I liked a story or main character enough to stick around it's important to help your reader decide that quickly otherwise they will go elsewhere.
I also liked how you changed the angles and shots throughout your first scene. It kept what could have been a very boring conversation between the characters interesting. So good job on the 'more showing, less telling' and avoiding the talking head trap in your first few pages.
So Blackenedrose, what I'm saying is you're not a trainwreck and my advice for you is to just keep pushing forward: keep drawing, reading, and observing the world and people around you- make notes/sketches on what you see; study other artists, writers, storyboard artists, etc. to learn things you can apply in your own work and the improvement and consistency will come from that consistent practice in drawing and storyboarding. I look forward to seeing where you go with your comic. I hope that helps. ^_^