Hello Sharon, nice to meet you, have a great Friday and enjoy the weekend.
if you want to respond to someone that made a comment on your wall just click on that persons picture and it will take you to their page scroll down to their wall write something and then click submit and you just commentted on that persons wall.
If you have any questions just leave a message on the page where you rertrieve your messages from or their comment wall and we will help you. There is a lot of information here and lots to do.
Please do not be afraid to ask
Welcome and thank you for being a friend.