If you're seeking Words Of Wisdom I would definitely recommend the Nerite Snail> I got a Tiger Nerite and it maintains my 10gal with no diatoms and green spot algea. My mystery snail can't touch it because it helped eat the algea/moss growing on its shell.
Don't take this advice wrong, but we all have a trial-by-fire learning experience:
1) Post a picture of your unknown plants
2) Don't forget a water change every other day for this cycling tank, the smaller tanks are more stressful on fish, and they can accumulate damage, don't be disappointed with a die-off.
3) Gobies are brackish water I think, so there might be issues with the plants & otos.
4) Regarding lights: OK for now, but down the road I would invest in 24" fluorescent bulbs with a full spectrum in both red and blues, the screw CFLs are blue spectrum heavy(algea love them), the lilies need red spectrum more so.