How to switch the right sidebar to become a left sidebar?

What Theme are you using?

Linen.

https://thethemefoundry.com/linen/

Here is what the support guy said, but I don’t know how to do what he says?

“You could try swapping out the code in the index.php file for the code in the left-sidebar template. I think that would accomplish it.”

“I would try making an index.php file in your child theme folder and then just pasting in the left-sidebar template into that new file.”

I use HostGator. How would I do this with my file manager?

What your trying to do isn’t really simple, depending on how the theme is built.

Using Firebug, I switched the float on the #content div from left to right, and the float on the #sidebar div from right to left, and that accomplished the task (it would need some margin tweaking to be perfect), but I am not sure how that would effect any other pages in the theme. It might work just fine.

As for the 2 suggestions the support person gave – those are terrible, terrible ideas and just absolutley would not work.

Agree those support ideas to maybe think try might

are terrible