The vast bulk of FOREX trade goes through the interbank market; individuals basically get leftovers with either currency futures or through a "direct" forex trading firm that will take the other side of your trades.
Forex is a market of relative values; going long the euro means you are short the dollar, etc.
If you are just looking for a pure intraday trading vehicle, I'd recommend sticking with equities or index futures; unless you have a special interest in international money supply I'd say starting out that you are too many steps removed from the heart of the action in forex to really be able to determine what is actually moving the market. Hope this helps.