Are you based in the UK? The customer discovery book is pretty brief because the guy who created the concepts, Steve Blank, is an engineer and wrote a 500 hundred page book explaining a concept that only required about 20 pages!
Most of the website article advice is for readability and SEO (which is based on quality and readability, not tricks). Is your site for your writing? I recently published an article, based on Google research, on matching emotional needs of buyers with content. https://medium.com/@martinedic/startups-the-six-basic-needs-that-drive-searches-and-buying-decisions-8a73cf88a935
Quite mixed about writing for Medium, mainly because the volume of self-help articles about writing is a little off the charts. Most of it is motivational emptiness, to be honest…