I am very new to creating websites. In fact, this is my first one. I downloaded and installed a modified version of the theme... and here is what I have now...

www.howtotextwomen.com

How do I change the "Not Found" on the left? No matter where I move widgets around, I can only get them to work in the "Right Sidebar" slot where you see the Site Information now.

It appears I cannot add widgets to Left Sidebar and Left Inner Sidebar.

I tried publishing an article and it still says the same thing.

what do you mean

I downloaded and installed a modified version of the theme.

do you have any posts yet?
I'd suggest you also get rid of that anoying popup.