First off I would suggest you go to the 'New To Hobby' Section, then at the top of that page is a link called 'Beginners Resource Centre'.
The beginners resources section is a really really great place to learn all sorts about keeping fish. But particularly for you it'd be good to teach you all about cycling a tank.
Cycling a tank, put simply, is the process of making it safe for the fish.
Some pet and fish shops suggest leaving the tank with the filter running for a week and this makes it safe for fish - This is untrue
Some pet and fish shops will also try and sell you 'bottled bacteria products' to make your water safe for fish or to help 'cycle' the tank - These generally speaking don't work at all and so are a waste of money.
Once you've read about cycling in the beginners section I hope you decide on a fishless cycle!
As for fish, Here are some ideas
2 x Honey Gouramis
6 x Pygmy Cories
Or
2 x Honey Gouramis
4/5 x Ember Tetra
1 x Pitbull Plec
Or
2 x Honey Gouramis
4 x Micro Rasbora
4 x Pygmy Cory
Or
2 x Honey Gourami
5 x Norman's Lampeye or 5 x Boraras brigittae