Simple enough then, go to this link and download the messenger, then enter your email and password and it will log you on, from there you add others that have it by adding their messenger name or email.
Yeah it's fine, I do security so i just sit in my company vehicle all night, when i'm not writing i play games or something on my laptop so going online wouldn't be much different.
I basically get paid to sit and flash my lights. Xd