I don't, as far as I know, have ADHD. I did not notice foreshadowing and such until I took an elective in college that broke all that stuff down for cinema.

Now that I know, I notice it. It's like hearing the Wilheim scream. Once you know what it sounds like, you hear it pop up a lot. A Lot. I never noticed it at all before.

Same thing with Hero's Journey in storytelling.

Once you learn to recognize these things, you can't not notice them. Sometimes it ruins things a little, sometimes it makes them better.

If you want to know how to read the clues, watch some youtubes on how to spot everything. People love making videos about it.

Or, just continue to enjoy the ride, but stop asking for it to be explained. If you want the explanation either learn the clues or just read a spoiler summary beforehand. Don't risk ruining it for someone, who overhears your conversation by accident, when they just wanted to enjoy seeing the story unfold moment by moment.