I have one of the highest ranking pages on Google for the search term "How do I validate my startup". How can I make it better?

This blogpost is on the front page of Google for a bunch of variations of that search term.

https://neilcocker.com/2020/08/22/how-to-validate-your-startup-idea/

Yes, the design of my page is shitty! :-D

I need to do something about that, of course.

But what else can I add here to make it more USEFUL?

First and foremost, given the amount of traffic it receives, I want it to be more useful, and save founders time and money.

Secondly, I'd love one day for this to be the #1 article on the web for this subject (although it's up against some fairly stiff competition from some major players).

Any thoughts or ideas? Thanks in advance.