The best way to associate yourself with any type of mythology is to do research. Such as gods, practices, lifestyles..so on and so forth.
There are some mythologies from the top of my head
Greek
Roman
Norse
Aztec
Celtic
Basque
Etruscan
Latvian
Arthurian (you know, like the Knights of the Round Table and stuff)
Egyptian
African
Haitian
emmmmm......
Incan
Mayan
Native American (Indian)
Chinese
Hindu
Japanese
Korean
Islamic
Judaic
Mesopotamian (very interesting stuff)
Persian
....and I can't think of any more.