Looks like I am back to the beginning...
I edited the css to my liking, I went back into "design". I clicked on the edit button on my current theme to modify one little thing, saved it and now I seem to be back to the beginning. Can you outline the best steps for customizing your css? Is it still possible to go back into your design section or should I avoid this area after customization?
Also, I still need to understand the steps for adding a gallery to a div and ensuring that it is the size that I want, for example, the siteMessage div.