How to open a position
Like most activities, trading comes with it's own jargon. Pip, spread, bid, ask, long, short etc. Don't let it scare you of because you'll get their meaning soon enough. On the one hand they might seem like a necessary evil, but on the other they'll sound really cool when you want to brag at parties about your trading succes.
Like we said before, currencies are traded in pairs, so basicly it's an everlasting race between one currency and another. You can trade the Euro vs. the USD, or the GBP vs. the USD, but also the GBP vs. JPY (Japanese Yen), or the EUR vs. the GBP. Currency pairs such as the GBP/JPY and EUR/GBP are called cross currencies by the way, because neither currency is the USD. But you don't need to concern yourself with that at the moment.