Welcome to Tropical Fish Keeping. And good luck with college.
Lots of good suggestions and ideas from previous responses. Something I haven't seen (unless I missed it, getting ancient here
) are water parameters. If the water out of the tap going into the aquarium is soft, or hard, acidic or basic, it will help to know. Some fish can adapt to some extent (this in my experience is limited), some cannot at all. For an obvious example, no point in planning on a 10g with a pair of Mikrogeophagus ramirezi (blue rams) if the water is hard and pH of 8. They would be dead within days.
A comment on the plants, you can have beautiful planted tanks without CO2. Just look at the photos of my Aquariums under my name on the left. Or Angel079's, or Wisfish... and others (sorry, can't remember you all
). We are all low-tech, natural-style aquarists. The light is important, but nowadays on a 10g an incandescent hood (they are cheaper) with two CF bulbs in a daylight or full spectrum type works wonders.