I want to create an app like Facebook or Whatsapp how can I start
Can you be more specific? How much do you already know?
If you can do the advanced back end projects from fCC, you should be able to copy the basic functionality of facebook (posting stuff / liking / commenting). Whatsapp is something entirely different since it requires real-time communication.
How can I do the advance project from FCC please highlight more on FCC
Just in case you haven’t seen it, here is the freeCodeCamp (FCC) curriculum:
Work your way through this, using other resources and the forum as you need them.
Thanks Man you really tried for me