Here are some resources for learning React so that you can better understand your Divjoy codebase and customize it to your needs.
Free
General
The Beginner's Guide to React
Scrimba - Learn React For Free
Upmostly - Beginner Tutorials
Hooks
React - Hooks at a Glance
React Hooks Tutorial (by Robin Wieruch)
useHooks - React hook recipes
Paid
General
Epic React
UI.dev React Course
Complete Intro to React
Is there a good learning resource that you think should be on this list? Let me know.