How do I connect MariaDB to Node.JS and Express.JS?

I'm doing Colt Steele's The Web Developer Bootcamp and I've got to the point where we're going to start a database for the YelpCamp app. Problem is, he is using MongoDB, and I don't want to use that. I want to use MariaDB. How can I get Node JS to work with it? I've already added it to my project using npm install, but I've got no idea where to go from here. I can't find any guides pertaining specifically to nodejs and mariadb. The official guide is not beginner friendly. I have no idea what alot of it even says.

I'm not working thorugh Cloud9 like he is because they're not accepting new registrations. I am running node.js on my computer using the command line, and have been following his videos that way.