Regarding the following request.
Finally, when I view the page in tablet view, it goes to one column of blog posts, and the sidebar goes to the bottom of the page as well. I feel like this makes it look a bit stretched. Is there a way to keep two columns in place, preferably the one column of blog, plus sidebar.
That’s how responsive design works. It’s single column in mobile because of the space constrain.
Changing this to two columns in mobile will affect all other element’s design.
We can only provide simple custom css assistance in this forum.
For this redesign of mobile view, you can contact our developers for this service. https://theme4press.com/theme-customization-service/