Realistic, Honest Options for Free Dynamic Blog Post Templates (2025):

If you’re comfortable with coding,
You could create a child theme and manually edit single.php or use WordPress Template Hierarchy
to customize single post layout without a builder.
But this needs WP PHP theme dev knowledge.

My Best Recommendation (Free, Beginner-Friendly):

👉 **Switch to FSE Theme like “Ollie Theme” or “Twenty Twenty-Four” for now →
Use WordPress Site Editor → Templates → Single Post → Build your template visually.

✅ Completely free
✅ No plugin needed
✅ True dynamic template control for posts
✅ SEO-friendly if you keep layout clean