You have already received some good advice already. I just wanted to add I have several nano shrimp tanks and they all have moss, moss and more moss. The shrimp like to climb all over it and pick at it and they are great for baby shrimp when the are growing and seaching for microfood. I also have small clippings of plants such as Lobelia, java ferns, Marsilea, Pellia, Süßwassertang, Fissiden and did I mention Moss
I look forward to your journal when you strart it.