Needing help with databasing

Hello so basically I’m tryna make a website and now I’m onto the part where I’m wanting to make a login and log out and all the open source snippets are just a menu and therefor I can’t actually sign into any of them. Was wondering if someone can give me a brief description of how I can make a database system.

there’s a starter that uses SQLite, which you can use as a database

is your idea that I create a new project and use that as a database?

rather that you can look at how that starter project is set up and add stuff to your own project. getting cross-project interaction working well is fiddly, and SQLite ought to be lightweight enough to run in the same project as your existing stuff

I have every thing already setup I just need node.js