I have been trying to find a way to do simple file-system navigation as can be done using most command line interfaces such as

cd sourcetext

To change the current directory to one of its subdirectories without having to type the full path.

The help I have seen recommends such things as dired, helm or ido.

Is there otherwise a simple way, avoiding the invocation of a complete mode or software package, to merely change from the current directory to the next?

What is the simplest and most basic way in emacs to achieve the equivalents of:

dir

and

cd just_the_subdirectory_name?

PS. I am new user so please don’t annihilate me for me making rookie mistakes.