Scottyhorse
Aquarium Advice Addict
IMO I think it's a little trickier than FW or SW, because you should make the salinity vary week to week, or whenever you do your water change.
If you go the brackish route, you can do etroplus suratensis or maculatus aka the green and red chromide cichlids, respectively. They are both brackish species and aren't extremely common in the hobby. You could also add a couple toxotes jaculatrix (archer fish). And then for some bottom movement, some brackish bumblebee gobies or knight gobies (one of my favorites personally)
I love knight gobies always wanted some. Hmm maybe I will in fact try this
There are also serval crabs that are brackish and a type of goby (not sure which) that can climb out of the water and on to driftwood