The hardest part of posting consistently is not writing — it is running out of things to say. Every post you already published is a week of social content you have not used yet.
Take the post apart at its natural seams: the opening hook, each h2 section, any list, and the closing takeaway. That is usually four to six standalone pieces, each small enough for a single post.
Every piece already fits your voice and your audience because it came from a post you wrote for them. You are reformatting, not reinventing — which is the only way this is sustainable past the first month.