But now, the images ain’t showing anymore.
It looks to be working, I can see images on your slider.
Also i want to get rid of the massive space under the widget side bar.
Do you mean the space in your left sidebar after the widgets? The overall height of the website is dictated by the tallest content. If one of your sidebars has a lot more content than the other then obviously they won’t be of the same height. There will be space. There’s also the length of the post itself.
The most you can do is make the widgets in both sidebars the same number/height or just use one sidebar instead of two. You can also adjust the number of post showing (Settings -> Reading -> Blog pages show at most).
Although I don’t really see this as an issue.