Regular posting and this theme

I’m planning to start posting regularly again, but in the meantime, I’m looking for a new theme for the site. I’m not really happy with the current one. I like it a lot as far as aesthetics, but I don’t think it works for easy access to the site’s content. I like columns. Sidebars. On my phone, it works, but most of the time, I’m looking at the site on my computer, and for that, it just wastes a lot of space.