Spacing & alignment off + can’t get rid of ‘add title’

I got my first basic FSE site together but can’t figure out how to 1/ align all elements so they’re aligned. 2/ Get rid of extra spaces like between header and big picture AND on right side of elements, aside from footer 3/ What type of element is my picture, anyway? 4/ I can’t get the picture to fill up the entire width of the site. Are there really 2 columns but I think there is only 1? 5/ What is controlling the width of the page content – are there columns defining that space as well? 6/ How do I add space between paragraphs in my page content? 7/ Is my footer actually a header – at one point it seemed like it was, not sure now.

TIA for help.

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