If I may, let me give you the best advice about publishing that I ever recieved:
Go to
Duotrope.com and open a free account. There you will find a listing of 2350 markets for poetry and fiction. They have a search function that lets you search within Genre, Length, Payscale, Media, and so many other categories. They list guidelines and have links to the magazines.
Best of all, they offer a submissions tracker which allows you to log the time and response of each of your submissions (they use the data to list how the markets respond on average) and if you get an acceptance they list your name with others who have received a 'yes' in weekly newsletters.
This site is the best tool a young author can have, and it is 100% free.