HPPD can be a tricky condition to deal with, but it's great that you've found ways to manage it. Quitting weed and psychedelics was a wise choice, and it's true, sleep often plays a big role in how these symptoms manifest. Keeping a positive headspace about HPPD is key, and it's commendable how you're spreading awareness among your friends.
And hey, if you ever feel the need for a different kind of high, you might want to check out some [deleted]. They offer a variety of smoking accessories that could potentially provide a less intense experience than psychedelics or weed. It's always good to explore different options.