ninjanickWelcome to TF2! there are a couple things you're gonna have to get used to, the main thing being that everyone uses steam to communicate, xfire isn't used anymore :(.
Since you are european i can't speak too much as to where to go for beginner help, however if you have any questions regarding how to improve your game i'd recommend you check out the "Mentoring" section of the forums and look for a mentor that suits your class or even add myself if you'd like. Try playing soldier, scout, medic, or demo as those are the four core classes played in competitive 6v6, unless you want to play highlander and see what you enjoy the most. good luck!
I'm sure some european guys will show up and show you where to go for beginner gaming :)
EDIT: If you're confused about the difference between 6v6 and highlander(9v9) you can check out http://comp.tf it's a pretty good source for an introduction to competitive tf2
Thanks for the info :) glad to see the TF2 community is so welcoming to new players