I'm gonna be honest the character art isn't the best,sometimes you're inconsistent with the character proportions and I don't know if it's because of the site but the art looks stretched. But.
I think your background art looks amazing and for (what I think is) the first piece of work you've made, I think you've got potential. It's the first chapter so I don't know exactly what the stories about or how good it will end up being, but I hope you don't give up, cause you've got passion I can see it in your work whether it's the background, the character's or the cool move the antagonist uses to stop the mc's attack.
As long as you keep making new chapters or maybe even new stories you'll improve. I really hope you read this and be encouraged to make more manga and work hard for your dream, even if your dream isn't to make manga.
I hope to see more work from you one day.