Obsessive List Making

I was just diagnosed with Inattentive ADD last year. Medication was like a fog lifted. During my evaluation they mentioned that I scored high on ocd symptoms. I didn't get it back then, I had a very stereotypical view on what OCD was. Now almost a year later I am still on the waitlist for counseling and help. I struggle a lot with anxiety, RSD and I can't put my finger on whether it's the medication that is making it worse or if the medication has just given me a higher self awareness. But I see my mind like chewing gum, clinging on to everything way too long. Obsessing about everything. Wanting to know everything. I can seriously waste a whole day on youtube researching a stupid topic, or surfing 4 hours to buy a cream online. I have a system of so many lists, that I am constantly overwhelmed. I guess it's my shortterm memory due to ADHD that has created the habit that I MUST store all usefull information in case I forget. I have heard that inattentive ADD and autism have some overlapping of symptoms in that regard. I have been doing this for over 30 years. How do I let the habit go? What could I do instead? Buy a whiteboard? (Limited space) or try timeblocking? I'm so stuck.