Homer just gave you excelent advice/suggestions
All I will do is tell you what I grow in my 2.5 shrimp tank with sponge filter and 13 W light.
laces java fern - 2.5 " tall
Marsilea minuta - about 1"
a bush of fissiden moss
2 stems of sunset hygro - kept to less than 3"
small patch of mini pellia
Subwassertang - just removed most of it as it was overgrown
tiny anubias plant - now taller than 1.5"
Best wishes with you tank and hope you enjoy it as much as I do mine