How to build а operating system from scratch and also will not promote want to build a fully functional operating system like the linux or mac or windows The i want to is Windows is too fucked up syst

How to build а operating system from scratch and
also
will not promote
want to build a fully functional operating system like the
linux or mac or windows
The i want to is Windows is too fucked up
system Mac is expensive and they sell hardware more than
their software Linux Is too technical for normal person and
even sometimes for programmer also
The question is how build it how to find resources to
he hardware as well as software part
File systems Ram and other stuff Other apps can run my
system any thing My own formats and networking thing Gui
mean all of the things
also want to sell these as a product