Are you planning on a fertilizer enhanced substrate like Eco-complete or Floramax? If not then you can pack it full of root tabs. There are DIY root tabs that are very easy to make and aren't expensive at all. What kind of light are you using? A good, strong LED will be able to grow any common, easy plant and you shouldn't have any problems with it. I recommend plants like Java moss, Java fern, hornwort, elodea (anacharis), bulbs, swords and anubias. These are all fairly easy plants to have and the only thing you need for them is a light and some root tabs (mostly just swords and crypts need root tabs) I think that you should do DIY Co2 here. Easy, cheap ad it helps the plants grow a lot. I don't know much about fertilizers but I use API Co2 Booster and the plants like it so I like it. There is also API Leaf Zone which helps as well with planted tanks. Plus lots of other ferts that I don't know the names of. That's about all you need for plants, just let us know about your equipment and we can help you a lot more.