Yes, it’s something that has been posted many times, but many people miss out a little gem from this article.
Near the end of the article there is a link for another blog post, discussing the energies of nuclear fusion and fission. It’s from 2012 but I highly recommend it if you want to dive in into the energy calculations of fusion (and a proposed alternative:
https://dothemath.ucsd.edu/2012/01/nuclear-fusion/
