You don't need to major in creative writing to begin a blog or write an excellent speech. However, you will want to add story of people and situations to make clear and effective points.
New writers sometimes stick with concepts they know and use their blog to teach or simply to share. Essentially, their blog is a summary. But is this enough? To really entice your readers, offer stories - not just concepts - about people and situations that have undergone changes. Be sure to reveal your expertise.
This podcast episode reveals a basic "course" in creative writing, and if you would like to go further, I invite you to reach out:
https://www.coachdebby.com/connect