This is an example of the type of blog post you can add to your Current Projects page.
In the right side column there is a link to add a Featured Image. You should use this to link to add an image from the Media Gallery representing this post.
It is also a good idea to create and assign categories for the posts. I would suggest sign or project types as categories.
You can select categories or add a new category.
One more thing, I would suggest is in the right column under Discussion to be sure to uncheck Allow Comments and Allow Pingbacks & Trackbacks.