well first there has to be a spot in one of the teams secondly...well depends on the team. for example LZ.Pink usually takes people that are well known to them or fun to play with etc, so they know how the player they uhm hire is playing. that way it will increase the duration of the team and creates overall a more enjoyable ambiance between the players. (or it abducts people like antou, but that's the different story =D) but mostly..check if there are spots open, ask the leaders! An alternative option is that you might be able to create a new LZ.war team, but you have to discuss that with the LZ.war-teams leader. so you can check up if we want another squad.
Now now Pablo, we have a bloody Bball player in our team But yeah, speak to the leaders. There is a difference between public and comp though, like you will need to have a headset, good communication skills. Then there is the other stuff like what class you want to play, as each class has a pretty big role in the whole team; Scouts - Getting behind the enemy lines, taking quick picks on the medic, working together to capture points etc Solly - The main driving force of the team (one goes the medics pocket and the other roams around). Also there is jumps to the middle of the map, to get there as fast as possible. Demoman - Area denial, get around the map quickly, sticky spam/traps, jumps to mid like the solly Medic - Well yeah, dont die, heal everyone, the most important player to keep alive which is why they are always targeted. So yeah, if you're good at one of them classes, speak to one of the leaders and see whats going on.
Add me to friends if you have any specific questions or if you're wondering about training, I might even be able to invite you for a PCW so you know what it's like.
become a wellknown face on LZ for one haha (don't want to sound harsh here so don't take this the wrong way haha)