Actually the white wall that is just behind the laptop is much better than a ring light. Just bounce a light source of it and you'll get a very nice light. Search for "bounce lighting" if you want examples.
I have this setup - I have a LED lap that I pointed a the wall and turned the camera on - much better lighting for video calls and wat not.
I'm recruiting at the moment and I don't think we've had a single application without at least one spelling mistake, typo or grammatical error. I'm having to review my policy of automatically binning any applications with errors.