Changing the culture of an organisation is really difficult. Ideally you'd need support from senior leaders as well as front line staff. Without both of those it's going to be next to impossible.
I like these (although some of them use lots of business jargon).
If you like video you can try this by Professor Amy Edmundson from Harvard (it's a bit clunky because it's an online conference): https://youtu.be/rhVXwdzdPcc?t=880
You're right that there's a lot of content about the benefits of psychological safety, and how nice it is to have it, but not nearly enough about how to create it if you're stuck in an org that's reluctant.
I like these (although some of them use lots of business jargon).
https://www.health.org.uk/sites/default/files/HowCanLeadersI...
If you like video you can try this by Professor Amy Edmundson from Harvard (it's a bit clunky because it's an online conference): https://youtu.be/rhVXwdzdPcc?t=880
You're right that there's a lot of content about the benefits of psychological safety, and how nice it is to have it, but not nearly enough about how to create it if you're stuck in an org that's reluctant.