Oh boy! You are in a for a ride if you cant even decipher the quote

At least you are asking questions!
Ok, starting from the top left, that is the current bid obviously. It looks like you are using FXCM, if you want to sell, you click that side. To buy or go long, you click the ask side. You can go short (sell) just as easily as you go long.
The 00 are the next two decimal points after the 1.21, so the current quote is actually 1.2100 as is seen at the bottom. FOREX moves in small incriments, we call them pips, as you can see the current ask is 1.2103, thats 3 pips higher.
You can make $100 off a 10pip move in you mini account, so those little pips are important.
Good luck!