You should start writing.

Do you have any expertise in any field?
What is the status of your current job?
Can you sustain it?

Your expertise doesn’t matter. Live your life and read and reflect enough, you’ll have things to say. Things to think more about. Write is thinking on paper.

Your current job doesn’t matter. You write because you’ve ideas and you can’t keep them to yourself. You won’t write well enough to earn a living if you only write to earn.

But sustaining it does matter. Typing words eventually becomes boring. But it is The Practice, trust it. Like how a worker does manual labour, it is your emotional labour. Force yourself to write. It’s worth it.