Hi Audrey — here you go. This is a link to the fiction publications. Just click each one, look around to get a feel for it. Find a few that interest you.
Then check to see if any of them are listed here:
Supermeditor is an online submission form for publications that chose to participate. If any of the publications you like are there, applying is as simple as filling in the form.
If you find some you like that aren’t at supermeditor, go back to the publication and look to see if they have submission guidelines. Most do.
Also — don’t submit the same story to 2 publications because stories can only reside in one publication. But you can submit 2 different stories to 2 different publications.
Good luck — looking forward to seeing you grow! :)