Can anyone tell me about the CMS environment in planning a website?

Question

Initial Scope and Development Plan - a detailed plan for building out the site,
including infrastructure (CMS environment) specifications.

Answer 1

One of the best CMS programes is wordpress . So many tutorials in web and it is very easy to run ,no need to learn coding

Answer 2

What is the need of WordPress if we can make our own website using html and css