How do I create a consistent Mindfully branded template for social media posts Facebook using our logo and brand colors?

Hi everyone,

I run social media for Mindfully, a mental health practice, and I'm trying to create a reusable branded template in Adobe Express for our Facebook posts. I want every post to consistently use our logo, brand colors, and fonts without having to manually reset everything each time.

Specifically, I'd like to know:

1. What's the best way to save a template with our logo and brand colors so I can quickly duplicate and reuse it for new posts?
2. Is there a way to lock brand colors or fonts so they stay consistent across different templates?
3. Any tips for organizing multiple post variations (e.g., quote posts, service announcements, testimonials) under one branded style?

Any guidance or best practices from the community would be really helpful. Thanks in advance!