Adding plants to an aquarium, will not improve the quality of your water...And I am sure not an expert on plants... but, there are many benifits... Sometimes, when you get plants that grow enough, you can make cuttings, and therefore, add more to the tank... With fake plants, you can't. Some fish are fond of specific plants, and if around them, makes them feel more secure/happy.
How many watts is your light? As you already know, the more the light, the better the growth...
CO2 is another thing that can make your plants healty... Although they are difficult to make, and expensive. CO2's for the more 'experienced ones'
Good plants to start out with: Anacharis, Hairgrass (foreground), Cabomba, Java Moss, etc... there are very many, suitible for a beginner aquarist.
It's basically up to you, whether or not you want to add live plants to your aquarium. IMO, live plants are way better than fake ones... Not sure why, I'm just more fond of them. Whatever you do, good luck, and keep us updated.
Post this same thread over in Aquatic Plants, you're sure to get more responses.
HTH
