and this is basically what happens
"After I defeated the Trojans, I headed home to the people, children and wives of Ithaca. Little did I know, I had been forsaken by Poseidon the mythical Greek god of the sea, whose anger knew no bounds! I met cyclopes and giant beasts who had the potential to eat at least six of my men and creatures who could swallow entire oceans. I met witches like Circe and Calypso, and met princesses like Naucissa. I was helped by the wind keeper and I had to travel to the land of the dead! Finally I made it home and still I met adversity. My son had been mistreated, my house desecrated and my wife harassed by many suitors. It did not matter though, none of them could defeat me and I finally was able to hold my wife Penelope in my arms" Odysseus-Conqueror of Troy
A year.
Hermes giving him the moly potion
Odysseus does
Hermes
Circes.
Sending scouts to Circes island is one Sending scouts to the lotus eaters is two Going to meet polyphemus is three
Circe wasn't a goddess she was a sorceress who lived on the island Aeaea and turned any men who came to her island into pigs until Odysseus stopped her with the help of the god Hermes.
The animals in Circe's hall are Odysseus's men.
the god who helped Odysseus repel circes spell would be Hermes the mesenger of the gods.
Circe keeps Odysseus on her island for a year by providing a good life style for Odysseus and his men, including Odysseus lying with her. Calypso also lies with Odysseus, although she keeps him on her island passively by not helping him escape.
On Calypso's island after Zeus makes her release him.
That's easy, he eats Odysseus' men and they barely escape the island with their lives.