Reset WordPress DB

Greetings and thanks for your time!

I have installed wordpress on my localhost xampp web server for local development. I also loaded some sample content to the DB (a number of posts, comments, etc.) just to get more familiar with wordpress. I would like to remove this content from the DB without removing my plugins/widgets/configuration settings. I have also worked on a custom theme that I want to keep as well. My goal is to finish development of this wordpress site on my local computer and then export/import it to my external web hosting provider.

Is there a fast/easy way to remove all posts/comments/etc. from a wordpress DB? I am not very familiar with mySQL, any details you can provide would be most helpful.

I also found the WordPress Reset plugin, but I’m concerned that using this might remove everything including my plugins and configuration settings.