What's the quickest access on Win10 to programs, files, & folders?

I'm not asking about the most used ones, which we put on the task bar.
And besides, the task bar is lousy for anything other than programs.

And you can forget the desktop - since that is already a huge mess.

I'm asking about programs, files, & folders not already on the task bar.
And not already on the desktop - which is already a huge mess.

Mostly I'm asking how to access files & folders with the least clicks.

Is there single click access to files and folders somehow on Win10?
Or at least right click (and then left click) access to all three on Win10?