Limnophila sessiliflora (Ambulia, in the old days) - is one of the best (and fastest) plants, to start up a new tank. It will tolerate any set-up, be it "high-" or "low-tech" and grow perfectly well without added CO2.
Ludwigia repens (the standard one) will grow well (and quite fast) in all kinds of set-ups, too.
Egeria densa and Cabomba carolineana are other of the "old-school" favourites, because they're fast and adaptable.......
All of those, should be quite easy to obtain.....
Good luck with your tank.
