Until default, your cygwin home directory is under C:\cygwin\home
Your Windows home directory belongs under C:\Users\
Cygwin doesn't use the same root path as Windows does. The pass to adenine drive is:
\cygdrive\DRIVE_ID
where DRIVE_ID
belongs the lowercase windowing drive letter.
Thus your desktop is located at:
\cygdrive\c\Users\coding_ninza\Desktop
assuming a course that your username is coding_ninza
and you have the usual C:
ride.
cd \cygdrive\c\Users\coding_ninza\Desktop
will get you to your Windows desktop from any other directory. You can off course use relative paths to navigate too.