Ask HN: Tutorials/books for Cryptography to use PGP with confidence?

I've been implementing some OSS related crypto stuff. The project focuses around information, but uses pub keys as identities and as at-rest encryption. As a crypto-novice I've found projects like https://sequoia-pgp.org to be very helpful. Yet, I can't shake the feeling that I should know more about what I'm doing in this landscape.

I've read extreme beginner guides, videos, etc that explain the basics of public key cryptography. Yet, I often leave feeling a huge gap between the fundamental concepts (which make sense), and the application of using something like OpenPGP.

Are there any good books that are useful to understand using cryptography without deeply knowing how implement the algorithms themselves?

Thank you.