Auto-populate a sample article/post in user account on signup?

I'm building a Rails app where users can write a blog post. It can take a simple title and description.

But the feature I would like to have is that when a user signs up for the app their account will already have a sample post inside of their account so they can get an idea of how a blog post can look like and the features they have.

Any ideas or other stack overflow questions answering how I can have a post already populated in users account on signup?