I believe the content will come with time, so that’s nothing to worry about. In the moment yes, the site looks a bit empty.
What’s more important is that you are lacking of images in your pages. What’s easier to get through, a page in a book where there’s only text, or a magazine page with 2-3 pictures?
People always find it easier and more entertaining to read posts/articles with logos/pictures in them.
You are on the right track with simplicity. Simple is good 
. Also are you planning on monetizing the website? Because the only place I found affiliate links was under Blackjack Software – > Online Casinos and that’s it, and even that page has no banners.
While a lot of affiliates will tell you that many sign ups come through links, you need to create the “gambling” atmosphere on your platform (site).
Look around the forum, checkout people’s profiles. I know I did when I started and always found something I can use as an idea. Good luck and most of all have fun.