Do you know how hard or soft your water is?
Cabomda needs moderate to high lighting but will survive in low lighting. All plants need about 8 hours of light a day and a liquid fertlizer will certainly help out if you want to use one
Plants also tend to like softer water rather than hard so if you can get a piece of driftwood in there, that would be great but if not no worries
I use liquid ferts on my tanks, instead of one dose a week like they say on the label, I split it in half and use two smaller doses a week, they really enjoy that. And for substrate, doesn't really matter. All plants will pretty much grow in anything