I have to admit that I’ve never used this theme to set up a sidebar on the front page, so I don’t know off hand how I’d choose to do it.
However, there *is* a sidebar on the front page – it’s just positioned at the bottom, horizontally. It’s the same HTML, however, so you should be able to accomplish this just by editing CSS.
All of the styles are tied to the .home class on the <body> element – in fact, you’ll end up with a perfectly normal sidebar if the only thing you change is removing the class .home from that page, so that might be your best strategy.
(Oh – and if you really do want to buy me a beer, you can do it here: https://www.joedolson.com/donate/ )