Your question is how do you follow your adhd driven deep interest dives without committing to a graduate program while contributing to the field.
As a PhD student and someone who acts similarly with hobbies, current one is self hosting, I would say a couple things. Firstly, if I had to do it again I might say get a good paying job that you’re interested in and explore your hobbies on your own. Not getting a PhD won’t make you miss out on anything but 7 years of work for some credentials. Most of the skills you can hypothetically gain on your own, depending on the field.
Secondly, there is such a thing as an independent research. If you understand how research works in a field and can research and write accordingly, you can certainly do that.
For wanting to contribute I would start a website for your projects. I would use this to contact people in said field for advice and ask what they think about your ideas. You could use them as a stepping stone for potential publications.
I would say at least 50% of academics especially the 30-50 year old one’s are more than willing to help, or at least meet with you, if they have time.
I hear these suck. No battery life and bad cooling.