Just be careful on what snails you get. Some people hate them because they breed rapidly. If you going with schooling fish and you have a good size aquarium, check for different levels fish tend to swim in. Some swim at top of tank, middle, and low. With a 55g you have so many options to go with, just research and ask people with tanks you like to see what they have to offer.
The worst defeat in the world, is when you give up.