The easiest way to get started with MongoDB is through MongoDB Atlas, a cloud database service — and it comes with a free tier.
Steps to set up MongoDB Atlas:
1. Register on the MongoDB Atlas website.
2. Create a new free cluster.
3. Set up a new database user and password.
4. Under Network Access, whitelist your IP address (or choose Allow Access From Anywhere).
5. Click the "Connect" button and grab your application connection string.
You should see
(MongoDB Atlas is a database playground you can use right away, with no setup required)