A good substrate is important for a heavily planted tank. I would recommend draining it and going with organic soil capped with black diamond blasting sand or pool filter sand. Also, suggest you check out some of Dustins videos on dirted tanks on youtube.
If you dont want to run pressurized CO2 be careful to not put too much ight on your tank. Otherwise you'll grow a mess of algae. A single T5HO bulb or a Dual Coralife T5NO strip light for $49 will work great. I had this coralife on my 55 until i went high tech with high light and pressurized CO2. A link to the coralife fixture is below. It produces a nice light and keeps you safely in the low light/ low tech zone. Plus its a nice looking low profile light.
Dont forget to feed your plants with something like Seachem Flourish and dose some liquid carbon with Seachem Excel.
When its time to buy plants, ive had good luck with www.aquariumplants.com