I have decided that I do not like this theme

The current theme is “Coraline”. I chose it because I wanted something that had a nice Gallery option. And something simple. I must have messed up somewhere. I do not like the font (which I can probably change if I dig deep enough), and by default there is no easy way to “press” a page (again, probably a way to change that). There is something that just seems intrisically wrong about this theme.