I think that's common. People always think of children when it comes to ADHD, but the majority of children with ADHD grow into ADHD adults.
Online support is probably the best option for most people. Coaches, IF they are effective at all (probably depends on the coach), are usually expensive and most areas don't have one. They aren't covered by insurance like most psychologists/therapists are either.

If we get more meaningful contributions here, we can all be our own support group.