If you are new, watch some YouTube videos. Marxist has some good videos on his channel. You don't need a mentor to learn the basics.

Every Saturday there are Newbie Mixes, more information is on the group page - http://steamcommunity.com/groups/na6v6newbiemix

If you're brand new you might just check out the MyGamingEdge videos.
They have some useful stuff for beginners.

http://www.youtube.com/playlist?list=PLD098F81F2CA74F00

http://comp.tf/wiki/Medic
more towards you but the whole site is useful
http://comp.tf/wiki/Main_Page

check this also http://forums.steampowered.com/forums/showthread.php?t=792794

not sure why you were minus fragged but the whole intention of the site is to be a valuable resource for new players to comp. At the very least it makes you familiar with the mechanics of the game, and most guides posted here are also linked on the wiki pages because it also works as a compendium of every guide out there

^
This has helped me get into competitive and the community is great.

Thanks guys i'll look into it. How do the newbie mixes play, i see a mumble server but what about a tf2 server?

Every Saturday, we will send out an announcement via the Newbie Mix group that was provided above. When you get that announcement you should join the mumble and select a preferred class, in your case medic. After teams have been drafted your coach will give you the server info that you will need. If you have any questions about Newbie Mixes feel free to add me or talk to another admin next Saturday.

turn around while you still have a chance

lol ok

if you have any friends that play comp thats a good way to get into it and have alot of fun

http://1.bp.blogspot.com/_a32bIBHgNoM/S8dBd9fAK-I/AAAAAAAAAoI/CCD4zrehU5A/s1600/versatile+2.png