I, too, experience that. I am anxious and I overthink and I am avoidant. Vyvanse helped a ton, but it was producing health complications, so I am taking something else that's not as good.
It's not a substitue for counseling, but consider talking to your favorite LLM chatbot. It will provide generic advice, but it will probably work 80% of the time. Sometimes being told what to do is good enough of a kickstart.
Or I can give you the crappy advice that works. "Just start."