Okay first of all, you need a fluorescent light.
If you have one of these, check the wattage and divide it by the gallonage. Low light plants need 0-1 watt per gallon, medium around 2 wpg and high light plants are 3 wpg and up.
Go for low light plants. First off, high light plants will totally flop under insufficient lighting, which is probably what you have unless you have dropped $80 on a specialty light fixture. Even with enough lighting, high-light plants need CO2 and more ferts to thrive. So whatever you do, stay away from hig or even medium light plants... they are just a setup for frustration if you have never planted a tank before!
Some awesome low light plants are: Water wisteria, moss of pretty much any kind, anubias species, amazon sword species, cryptocoryne species, java fern. You can usually score some good low-light plant lists by prowling around planted tank forums.
As far as ferts go, if you are running a low-light setup you shouldn't need a demanding fert regime. If you have gravel substrate, some flourish tabs will beef it up. Other than that, you should be fine to dose some micro-nutrents eg Flourish Comrehensive. I am a big fan of the Flourish line of ferts.... definitely the best value for your money. Beware of cheap ferts like Nutrafin Plant-Gro... they are more watered down, so you actually need to dose more of them, making them less cost-effective than more expensive ferts.