go multiplayer, custom skirmishes.
first play a few games and wIN against mnightmare AIs.
Read wiki on items, think about your demigod and their usage.
http://demigod.wikia.com/wiki/List_of_items
Choose a few Demigodws, and read and youtube a bit abouit them (plenty of links on this forum, check them out).
Play with ppl.
Pantheon isnt usable since you need to have a lot of players logged in it, and presently just a few ppl are gaming on it together kind of a tournament.
As to items, you can have several chest plates of different types, or gloves, or boots, but you can't have more then 5.
Game is great. Im hooked to it too, didn't like LOL...