Ask HN: How can I organise my operating system to increase productivity?

You need to work on your operating system, not your computer's operating system.

People who struggle with other mental health issues often have to try for awhile to find something that works for them.

You might try cognitive behavior therapy as a first attempt. It might work for you, or you might have to keep exploring. https://en.wikipedia.org/wiki/Cognitive_behavioral_therapy

You might also talk to your doctor to get an idea of what other types of treatment are available. A doctor can sometimes act as a project manager or initial consultant.