The only way to know if you'd be crap is to try writing. Short stories are a fun place to start, just pick a genre you like and give it a shot. Like everything else, it takes practice and your first few attempts will be crap. Advice: don't spend any time on writing forums or subreddits, they're full of people who'd rather talk about writing than actually do it, but despite all their theorizing they still can't turn out a decent page.

Find their first published stories. Find their earlier stories, sometimes they get used to fill out a shorts collection for laughs. Then ask yourself if you belong in that company.

And then ask yourself if you care, maybe you'll never write enough to have a shot at a publishing deal, much less a bestseller, but maybe you just like telling stories to yourself and maybe a few friends.

It irks me like when people describe burning man.