Trust me, it's not as scary as you think it is XD It's not like they're going to critique it, they're just going to read it and see if it's good enough for publishing. If not, well, it just means you can improve; if so, YOU GOT SOMETHING FUCKING PUBLISHED!
Regardless, you've made a submission, so don't sweat it. Considering you're a member of this site, I can guarantee you'll do fine! :P