Here you can see list of 15 web applications which you can build in a month in order to learn fundamentals of react.js, Node.js and MongoDb in depth
Each project has it's own repository in which you can find starter code for a project and a sample solution.

List of projects:

1. User Id Card Generator
   Learnings:
   DOM manipulation using Javascript
2. Clicker App
   Learnings:
   How to use hooks in react.js
3. Digital Clock
   Learnings:
   How to use useEffect hook in react.js and setInterval method in Javascript.
4. Scrollable User Feed
5. Image gallery
6. Quote Generation Backend
7. Quotes Generation Frontend
8. Website Navbar
9. Login authentication backend
10. Login forms
11. Information about Crypto Currency
12. Jobs Portal
13. Video Player
14. Charts Data
15. Online Dev Portfolio