55gal fish tank......?

You have so many more options! Get 3-4 angelfish, 4-5 more rasboras, 4-5 more cherry barbs, 4-5 more black skirts, get rid of the snails over all, I just put them in a container and leave them outside. And get 3 more Zebra Loaches. You can also get a bristlenose pleco. Then you'll have a nice community. As for plants, java moss, amazon sword, java fern, anubias, duckweed, moss and much more would work, but be sure you have done you research so you know what you need to do to keep the plant. Keep up on water changes and such and you'll have a great tank! Good luck!