No one can help you really until we know your lighting. Look up old plant articles. You need at least 1 watt of light per gallon. You need fine gravel substrate or sand. Its better to get flourite, laterite, or cheap aquatic plant soil like the sell at home depot and put a layer under your gravel. With low light you can do Vals, Sags, anubias, java fern, crypts, java moss. The java moss looks best attached to rocks anddriftwood. The java fern and anubias are also best attached to pieces of driftwood. You might even be able to do a sword plant with low light.