These often informal groups offer low cost or free avenues for information about living with ADHD.
I run one specifically for adults with ADHD in the Baltimore area, sponsored by the Baltimore Regional Chapter of CHADD. You can find information about those meetings, as well as other chapter meetings in Maryland on the calendar listing page of the chapter’s website.
If you’re not in Maryland, check the website of the national CHADD for chapters near you. (the map to find a chapter is WAY at the bottom of the page!) Also check on the ADDA website for support groups for adults with ADD.