There's a big blank space between sidebar and content…

Hello!

Current page I’m looking at is: https://www.zoryanarts.com/?page_id=35

I’m using: Pinboard

Please don’t mind the pictures or any of the text, I have the data in there just so I can get the set-up first.

My problem: There’s a big gap between the sidebar and the content, and it’s driving me nuts. I would like the two right next to each other, without any (or atleast minimal) spaces to any sides of either sections.

I at first tried to have the sidebar on the right; however, then the big white space was to the right of the sidebar, leaving a big gap between the sidebar and the right-end of the page.

Then I switched the sidebar to the left, and the big empty space is between the sidebar and the content. (It almost looks like there wants to be another column of something there.)

I’ve tried various codes, and while some have worked to push the content over, it also shoves the sidebar content down below it.

I would just be happy getting rid of that space and joining the two together, nice and even. Even better would be to extend the space of the sidebar a little, so the text had a little more room before it wrapped.

Even more better would to be able to have the option to put the sidebar on the right side, if I wanted to! But not needed. The above is more important.

Any help would be hugely appreciated. This is driving me crazy. Thanks in advance!