I understand that dopamine deficiency may lead to fatigue and lack of motivation as well as other symptoms. Any treatment, however, needs to be tailored to your specific medical history and circumstances.
Have you discussed these questions with your doctor and/or therapist? Do you have access to any vocational counsellors having experience with people like yourself?
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My dog

mastered the "fetch" command. He would communicate he wanted something, and I would fetch it.