Its alright Tired and Alone, I am 19 years old and don't know many things that so many my age and younger know. Did you know that I don't even know how to play any card games like poker, whereas everyone else I know does and they laugh at me for it for example. I dont know how to put on a tie for example as well. I feel so pathetic not knowing many basic things that so many others know, so its alright.
Yes, PMing means to private message, if you wish to private message someone, when you see the person's username, just click on it and you will see several options, one of them being "Send a private message to XXXX" and click that and you will be send to a place where you can write the message and send it.