For your and our own convenience, we have setup a TeamSpeak 3 server for occasional chats about this and that.
Get the latest TeamSpeak 3 client for your operating system from teamspeak.com and install it.
You'll need administrator privileges for this.
Start the TeamSpeak 3 client software and follow the instructions of the setup assistant.
Feel free to add the server to your bookmarks.
You can find answers to some of the most frequently asked questions on the official teamspeak support website.