OMG JH, 7-11 just started selling those here. They look like, well, turds.
Yesandno. Submitting is a horribly scary thing. The thing to remember is that once you've sent it, you must stop worrying about it. It's out of your hands. Move on to the next story. When, or if, you get a rejection, send it out somewhere else. Unless you get a personal rejection with a comment. If the comment is valid then you could change the story, or decide to nto change it. The important thing is to send it out immediately, and stop worrying about it. Really. It's hard to do but it can be done.
And congratulations.