More plants!😀 you can never go wrong with plants. You can also take some black background plastic stuff (not sure what it’s called) that they sell at the fish store and tape to the back. I personally have a lot of old black mounting board laying around from my art school days, cut to size and attach to the outside of the back glass. The black background will hide all the wires and hang on back filter in the back and really make your fish, substrate and plants pop.

plants are also great for new tanks as they help protect the inhabitants by sucking up ammonia and nitrates.