It's a hobby. I read a lot and I have enough formal education to digest primary sources (mostly; my highest qualification is auditing a neutronics course while in grad school).

If you too would like to know way more about nuclear weapons than is useful in civilian life, I'd recommend reading:

Richard Rhodes, The Making of the Atomic Bomb

The nuclear weapons FAQ, authored by Carey Sublette, a hobbyist researcher who is extraordinarily dedicated to understanding nuclear weapons from declassified documents and physical principles: https://nuclearweaponarchive.org/Nwfaq/Nfaq0.html

Anne C. Fitzpatrick's dissertation Igniting the Light Elements: The Los Alamos Thermonuclear Weapon Project, 1942-1952: https://www.osti.gov/biblio/10596

The Arms Control Wonk blog/podcast: https://www.armscontrolwonk.com/

Nuclear historian Alex Wellerstein's blog Restricted Data: https://blog.nuclearsecrecy.com/

The nuclear weapons subreddit, particularly posts on it authored by Alex Wellerstein, Carey Sublette, and a few others whose names currently escape me: https://old.reddit.com/r/nuclearweapons/

Chuck Hansen's book "U.S Nuclear Weapons: The Secret History" (out of print, sadly; will have to pay $$$ or find a scanned pirate copy) and his massive book/PDF "The Swords of Armageddon" available for purchase here: http://www.uscoldwar.com/

Let me add "Inventing Accuracy" to your list of recommended reading. It's fascinating, and it's a powerful microscope to reveal the relationship between strategic need and technological development

https://mitpress.mit.edu/9780262631471/inventing-accuracy/