I can offer 3 (short enough) references that you can share with your parents maybe, to get them educated about the topic.
- this short video lecture by Dr Barkley, a prominent specialist on ADHD. If you are looking for very practical advice, it's at 4:00-9:40.
- some stuff by Dr Hallowell (he is a therapist who works with ADHD people; he himself has ADHD and isn't medicated; his books about living well with ADHD get recommended in this sub regularly — it's "Driven To Distraction" or "Delivered from Distraction):
- "Chapter 1: The Skinny on ADD -- Read this if you can't read the whole book" it's a free excerpt from one of the books about living well with ADHD that gets recommended in this sub regularly, by Dr Hallowell (he himself has ADHD and isn't medicated). // The formatting is bad though, makes the wall of text hard to read.
- 50 tips for living well with ADHD (free PDF), again by Dr Hallowell. It's newer version is in his Delivered from Distraction book, but the changes aren't significant.
The downside is that this content isn't recent, so maybe this can decrease the level of trust your parents will have to those materials… But you yourself will definitely benefit from reading/watching them.
Also, there is a free course on Coursera about ADHD (well, it's free in Audit Mode at least), by The State University of New York. Since it's by a legit university, your parents might take it seriously. I found this slide https://i.imgur.com/gKu5RIZ.jpg with some summary from that course on reddit recently. From what I see there, it repeats some points from that Dr Barkley's video lecture I linked to above.
And, for your own education, "—- MEDS" section in this Monkey's List can be helpful. It's by a published researcher & mental health professional who has ADHD.