Thanks for the helpful answers guys.
I'm still no clearer about all of this, but I found a link to "one of the best" colleges in the area, or so I've been told. I've had a look round, and I know many people who are in my sets. Many of the teachers reccomend it too, so I think it's a fairly good contender.
Link to the College website here
A few more questions however
How do I find out what I want to do? I know there are open days for the colleges/Uni, and stuff like that, but I'll take any advice given to me at the moment. You've all said "You won't know what you want to do", but then how will I know which direction I should aim in when I go to college?