Lovely tank!
I have one in a 10 gallon, divided in two with betta on one side and cherry shrimp on the other (I bought the cherry shrimp on sale and am waiting for a new tank to cycle). I have 15 shrimp, hopefully i manage to breed them!
Your tank is wayy nicer though

I love the leafy plants. Mine has black gravel and some java moss and assorted other weird plants (none of which are anchored).
My betta nipped at the shrimp when I first floated them, and he gets excited if they swim around (betta prey drive I guess), but sometimes they get across the divider and so far no losses. Hopefully yours is placid!