Fish in my community tank?

Hi, I want to start a community aquarium. The tank I want to get is going to be a 15 inch cube (15 gallons). The fish I want to get are :
One male swordtail
One yellow male guppy
Two female fancy hippies
Two mystery gold snails
5 neon tetras

Are these fish okay living together? Is my aquarium overstocked?
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