Hi there, I'm not totally sure how to say this but I'll just go ahead so I might be of help in some way.
Writing is an integral part of storytelling. You have to know when to add action, drama and suspense in the right amount and at the right places so as to keep the reader hooked.
Good artwork won't get you far unless your reader is hoked from the start. I can say this with confidence as I have picked up stories with the most beautiful art I've ever seen but the plot lacked substance or the characters were just down right irritating.
If you've got your art down that's nice but you need to know how to write so you can figure out which moments to panel for maximum impact.
Stories don't have to be overly ground breaking or explosive, they just have to be readable, and enjoyable to the targeted audience.
Extra advice on characterisation because characters are very important to stories. You don't have to have relatable characters in regards to their attitude. You just out them in relatable situations.
Hope this helps.