I feel you, it can be a real maze. For a solid deep dive, you definitely need a proper on page seo checker Semrush alternative. I have been using this one tool for a few months now and its pretty detailed for content gaps and technical stuff. You can check it out on this site. It gives a good score and actionable tips. Found it super helpful for my blog posts. Heres the link https://pr-cy.io/tools/content-analysis/ .
Nevinocho
Shadi Shadi