I have been told that many people have a "difficult time" with meditation. They find it difficult not only to sit still, but to "still the mind."
I was introduced to meditation (in the "formal" sense of the word) in the mid-1990s, as part of an enneagram and spiritual non-duality group I belonged to.
I could sit still and "empty my mind" for hours and hours, without any provocation.
I never gave this much thought until the first time someone suggested that I might have ADD. As I have written before, for most of my life I never considered the possibility that ADD was an issue... because I was only familiar with the condition in the context of "distraction and manic/hyperactivity," as I'd experienced it with my ex. Sure, I had a hard time focusing... but (a) I could never relate to "bouncing off the walls" because I've always been a "low energy person" and (b) I rarely had significant issues with a "brain full of swirling thoughts"-- instead, I was just "going to sleep."
Narcolepsy was a consideration... except I didn't go to physical sleep.
But getting back to meditation... for me, it's almost a "natural state." My issue was never about how to "go into" meditation... rather it was about how to not go into meditation. My entire life has sometimes felt like a "meditative state" that I have had a difficult time "coming OUT of."
As I gain more understanding of inattentive ADD, I can see why meditation was always so easy for me... in many ways, it's "equivalent" to a meditative state...