Since you're in middle school you can try books like Percy Jackson to learn a bit more?
Anyway, greek mythology... from what I know here are a couple major gods..
Ares, god of war
Hera, goddess of marriage, married to Zeus
Zeus, ruler of Olympus and god of lightning and order
Poseidon, god of the seas
Demeter, goddess of agriculture
Athena, goddess of wisdom and daughter of Zeus
Apollo, god of light and prophecy
Artemis, god of archery, hunting, and virginity
Aphrodite, goddess of love and desire
Hermes, messenger, god of commerce
Hephaestus, god of blacksmiths
Dionysus, god of wine
