When I first started working from home because of the pandemic, I had a IKEA Marcus chair, however, this soon was too bad of a chair to sit all day in, so I ended up investing in a Herman Miller Embody, and have not been looking back since. Great chair!
First thing that came to mind is that you should set a max width of the content container. For those of us that have a ultrawide for example, it can become hard to read when the content spans the entire screen.