Hello Ophelia, thanks for accepting my invite, nice to meet you.
II am going to give you some simple directions and information.
If you want to respond to someone that made a comment on your wall or you want to make a comment on a persons wall ( if you are friends with them ), just click on that persons name or picture and it will take you to their page. Then scroll down to their wall write something and click submit. There is alot of information and things to do here, like joining groups, discussion boards, making friends ( which is easy to do, just ask and I will help you ) , plus so much more. the best thing to do is to explore this site, it is user friendly. If you have any questions or comments just leave a comment on either my wall or any of your friends walls and we will help you.