That's actually a very good start...however, as you know, that fern is non-aquatic and won't live long...so you may want to consider trashing it...
Good plants for your setup would be:
Crypts [There are some that will do well in your tank, Crypt Wendtii's for ex...but some require a lot of light, but most do well in low-tech tanks*your Co2 might kick stuff into gear though.
Java Ferns [Needle Leaf, Regular, & Windelov]
Water Wisteria [still a hygro though!]
Mosses [Like Taiwan, Christmas, Fissidens[I think, I don't know much about that one], Java, etc.]
Narrow-Leaf & Broad-Leaf Ludwigias
Watersprite[though, this grows quick and you might get sick of it just as quick! LOL]
Aponogetons [same as watersprite]
Dwarf Water "Lotuses" [same as watersprite]
and of course more Anubias!
Hope this helps!