I was the same way, told my wife her yoga breathing stuff was a waste of time for years. Then I got stuck in a middle seat next to a crying baby on a 5 hour flight and thought I was gonna lose my mind, so I tried that 4-7-8 thing just to have something to do. Weirdest part is it actually calmed me down and I had to tell her about it later, which she loved way too much. So yeah, the jokes come back to bite you.

Ugh I feel you on this so hard. I did one of those "float tank" things last year for like $80 and spent the whole time worried I was gonna fall asleep and drown lol. What actually works for me is a long walk around my neighborhood right when I get home, like no phone, just wandering for 30 minutes. Sounds boring but my brain kinda untangles itself and it's free. Other thing is laying on my floor with my legs up on the couch for 10 minutes, weirdly helps after sitting at a desk all day. Also a hot shower with the lights off and a candle going feels way better than any fancy spa room I've paid for.