I'm going to be moving my blog over to a domain that I have purchased, but before I do that, I want to possibly change my theme, or at least customize the current theme so that my blog posts are collapsed to just the title and a small preview which when clicked on, displays the whole post. Basically so I just have a list of posts which can be clicked on to display the full content of the post. How do I do that? Is it something to do with CSS? I'm quite new to WordPress and blogging so I could really do with some help.
The blog I need help with is inspectorgraduate.wordpress.com.