Start out writing on LinkedIn
LinkedIn is a great place to get started writing as a professional. (Or, if you’re in a future timeline where it no longer exists, whatever the “professional” social network is).
It’s easy to get started. Almost too easy. You click “start a post”, write words, add some hashtags like the cool kids if you want, and hit post. The barrier to entry is low.
Can keep it short. You don’t need to write an entire book. Hell, you don’t even need to write an entire blog post. A couple sentences or paragraphs is probably ideal.
You don’t need to be an expert. Your experiences and ideas are useful to others, even if they don’t seem important to you. For example, you have insights useful to people just behind you in their career journey. What do you wish you’d known over the last year or two?
Talk with more people. Start exchanging ideas with people outside your company. As more people come across your writing your “network” will grow. The benefits go both ways, too. You’ll be exposted to new and interesting ideas/people.
And if you end up liking the process of writing, you can one day graduate to a blog or Substack or something.