How do I use Facebook?

[Great]

I'm new to Facebook, and I wonder if anyone here can give Me tips on how to take advantage of its features ... I've heard a lot about uploading pics, but how about changing My network - I chose the wrong network to start off with, and now I can't change it - and meeting people.

Thing is I think people I know might be on facebook, but I'm not sure how to find them.

I'd also love to get to meet people that I never knew before there, but how do I go about doing this?

Also, do you get to pay for the ads? How do I go about putting an ad up?

Plus, I want to know whether I need to really spend time on filling in so much of My details on the site. Will it get people to find Me easier? And how do I get people of like mind to find Me anyway?

Thanks in advance.