Hey, I just read through your first chapter, and I love your voice - it's good! If you wanted, you could do a minor clean up. There's some repetition of unnecessary words, such as
'Looking up I saw a couple of teenagers wearing thick coats and wearing beanies entering the gas station.'
You could take out the second -wearing- to make it read cleaner. Or switch up the adjective so it was a past adjective, as they generally read stronger.
ie I looked up as two teenagers entered the gas station. They wore thick coats and beanies.
Stuff like that.
But, dude it's good - I liked it!