First 5 Gallon Aquarium, Options?

Bettas need a 5 gallon heated tank with a filter. White cloud minnows like colder temperatures and 5 gallons is too small for anything besides a betta. I would not recommend a snail since they tend to make the water smell bad. Also, a tank needs to cycle for at least a week, usually a few days is not long enough. You would be able to add neon tetras in a bigger tank, but they like to school so make sure you have at least 6