I've been reading SEO-theory for years: https://www.seo-theory.com/
His paid newsletter is a great and is reasonably priced ($30 PM for 5 issues per month). He cuts through a lot of the bullshit which plagues the SEO industry.
You’ll learn more from subscribing to his paid newsletter for 6 months than a lifetime of reading blogs like Moz, AHrefs or SEOroundtable etc.
If you’d would like to know more about what he's about just read a few of his blog articles.