I am on board with those above, would buy more than one or two plant's. The more plant mass, the more beneficial for the ammonia reducing capabilities ,and also will support less algae.
Java moss would provide shrimplet's places to hide from platy's ,who I fear would happily consume any small shrimp's they happened upon.
Water sprite is good, fairly fast grower under low to high lighting, and lot's of this along with the Moss,java fern, and anubia would be good addition's in my opinion.
Some small pieces of wood, and some smooth stones piled around the wood would also help give shrimp more protection.
Course, if your up to your ear's in shrimp's,,perhap's some predation would not be troublesome.