I'm trying to add a sidebar to my blog listing page. I'm using the Aplite Blog template, which doesn't have this sidebar functionality built in, so I need to create a new module or new CSS, as well as edit the layout of the main page to accomodate the sidebar, can anyone help with this!
You could also reach out to the template provider. In this case I think that's Salted Stone. They should have email support in their Marketplace listing. I'm not sure if they're able to help with one-off requests like this, but you could ask.
And if you do get started and you run into specific questions, let us know back here and we'll see how we can help.