People will be interested in your services, but you need to post them where appropriate. Also post in the "Activity Feed" on the right side of the page where it shows what's happening. You can post anything you want there anytime you want. It says in the box to the right "What's going on?"
Robert, I don't let people advertise on the discussion page. I delete posts from reporters, scopists and videographers every day posting about themselves trying to get business. I can't let you do it and not let anyone else. If I let you, I have to let everyone and then there will be nothing but advertisements all over this website. Not all that interesting. Please post in the Classifieds section anywhere you want.