There is no magic formula for content marketing success, despite what some would have you believe. For this reason, vary the length and format of your content to make it as appealing as possible to different kinds of readers. Intersperse shorter, news-based blog posts with long-form content as well as video, infographics and data-driven pieces for maximum impact.
Lastly, it's important to remember that paralysis by over-thinking is a real issue some struggle with. There's no pill for it (yet). Predicting perfection is a fool's errand. Get as close as you can within a reasonable timeframe, and prepare for future iteration. If you're traveling through your plan and determine a soft spot at any time, simply pivot. It's many hours of upfront work to get your strategy built, but it's not too hard to tweak as you go.