Currently, there aren't any known templates. I did make a 2D game myself, but I had to script practically everything for it. Along with being 2D, my 2D game has a very strong 3D feel to it.
This is what my 2D game looks like. It's fully functional and I'm about 84% done with it at the moment.
2D isn't the best way to start with Gamestudio, rather, learning how to work with basic camera and entity commands are the first things. You are right in that you should start small.