hi adrian, welcome to AA.
fishkeeping is a great hobby, not as easy as people think, but you've come to the right place for tips and advice.
a good place to start would be learning about is how to cycle your fishtank and 'new tank syndrome'. that's the key to success when setting up a new tank.
here's a link to get you started: http://www.aquariumadvice.com/forums...es-154837.html
after that you can start researching the fish you are interested in keeping, to see if they are suitable for your tank size and compatible to live together.