WPyogi, Thanks so much. Very helpful. I installed the My Custom CSS and it works wonderfully. I'm opting against a child theme at the moment as my site will be very static and I'm not going to make a lot of changes to the theme, but it's good to have all my modifications in the custom CSS.
Re: Header, yes, I looked at Apperance-Header. I think the header image is actually the scratchy font title at the top. What's there now is fine. What I am interested in seeing is what's called the "home-banner" mentioned in this thread (halfway down the page):
Basically, I just want to replace the forest image (http://wordpress.danielatwork.com/project/pilot-fish/) with my own and have it be the visual at the top of the page under the site title. Something is still blocking that. Now that I am on this new theme, none of the modifications I did to the earlier theme are necessary now. I don't know if any of that stuff carries over from theme to theme, as with content. I'm probably missing something obvious, but me combing through the editor is like a blind man combing through a haystack. Can't tell what's relevant.
The h1 is now gone (Hooray!), but I am not noticing any change in the side margins with the wrapper code, and I went up to 200px. Maybe I am misunderstanding how that works. Ideally, I'd like to scootch in both the left and right a bit.
Re: the list, ideally the line space on the bullet pointed lists (ul) would be smaller so the lines would be a bit tighter. But that's really not a priority.
A lot of stuff I know. Thanks again.