Keep in mind, that water wisteria will grow a lot, and fast. It can be kept down to size by regular trimming, and you can replant trimmed portions to help fill the entire background with foliage. That, combined with those swords, will put you well on the way to a simple and easy to maintain Jungle style aquascape.
You can add some smaller cryptocoryne. Crypt Undulata "red" is readily available and would give you some color. I would use these in the midground, clustered into clumps, especially near your pot decorations.
Those swords will get pretty big. Don't be afraid to trim off excessively wide leaves to keep them under control, but since they are newly planted, I actually do recommend moving them back several inches and placing the pots in front of & beneath them. Then put that java fern in front & to the left of the pot so the fern is near the front to provide textural interest. This will also provide balance and leave the middle more open for viewing your fish.
Eventually, you're going to need to add fertilizer. My brand recommendations are based on what can be picked up at a local chain pet store, but there are certainly other brands that are popular & effective.
For swords and crypts, root tabs are your best choice because both are heavy root feeders. Both API and Seachem make inexpensive root tabs that are sold almost everywhere. Another popular choice is to make or order gel tabs filled with Osmacote, which is a more complete fertilizer, but probably isn't necessary in a low-tech setup. The water wisteria and java fern will benefit from adding liquids to the water column. The easiest to obtain, simplest combination would be API Leaf Zone & Seachem's Flourish, which will cover you for micros & macros (phosphate & nitrate come from the fish), are sold at all large retailers and are sufficient for a low-tech aquarium.
Welcome to planted aquariums.
