Amazon biotopes are getting a little boring :lol:
I think you should do a Congo biotope, with lots of Anubias and Congo Fern, and although it's not from Africa, Java Fern
For fish, well, something a little different would be nicer than boring old Congo Tetras. There is a very nice fish that I've kept before called the Yellow-tailed Congo Tetra, Hemigrammopetersius (Alestopetersius) caudalis. Also you should get some Wild Kribs, Pelvicachromis taeniatus.
BTW, I don't like the second, darker piece of bogwood resting on top of the horizontal piece. I think it should be removed, otherwise everything looks too cluttered.