Good, like I said, you may want to get a small heater while you're there, I have a 2.5 gallon tank with a heater that I got from PetSmart that was made for 3 gallon and under tanks. [it works really well, his water stays around 80 degrees constantly]
What kind of food do you have for your betta? Most people stick to pellets, but bettas like variety. I feed mine two-three pellets in the morning and a few flakes at night. I give him bloodworms as a treat on Fridays at night instead of flakes. [Make sure you buy betta pellets and tropical fish flakes- not goldfish flakes.] Bloodworms are meant as a weekly treat only, because they contain high amounts of protein and can bloat your fish or make him constipated.
When it comes to the plant, if you buy a plastic one make sure it also doesn't have sharp edges. I made that mistake and my fish ended up ripping his fins on it while flaring one day.
Hopefully all of this is helpful!