If you want to learn the general gist of competitive tf2 I recommend having a lookk on our get started page on comp.tf which is a wiki that focus on competitive tf2.

It also has a lot of other resources linked, like povs, guides, demos, etc, etc...

so it begins

http://www.youtube.com/watch?v=XGnn6eLcFmc

I second this, make sure to familiarize yourself with the different comp gamemodes, 9v9, 6v6, 4v4, 2v2, 1v1 and see which appeal to you.

When you feel like you're ready to try out either one of those modes, I suggest you try out tf2center.com to play organized matches on a low level.

thanks a lot for the responses.i will check those out

Also, don't get discouraged by people that say you're shit and you don't know how to play the game. There will always be people like that but if you enjoy the game, you keep at it. Along the way you'll also find people who are really willing to help you. Yes, tf2center is a good place to start once you've figured out the basic rules and how it works.

To figure out how everything works, you might also wanna check this out http://comp.tf/wiki/6v6 and this http://comp.tf/wiki/Highlander.
Highlander and 6v6 are the 2 main formats for competitive tf2 and when joining a tf2center, you will recognise which of these it is by the maximum number of people allowed in. Good luck!

EDIT: if you have any specific questions, feel free to add me or anyone who posts in this thread. We want to make you feel welcome here and we'll help out with anything we can!

thanks a lot once again btw i just watched the way of the samurai video haha

Welcome to competitive tf2! I made a bit of a list specifically for players new to competitive, hope that helps a bit. Good luck and have fun :)

http://teamfortress.tv/thread/18435/collection-of-resources-tips-for-6v6

Hopefully you meant just the first half of that video to be relevant...

(Seriously after that it's kind of a downer)