Unable to configure emacs 27.2 to use org 9.5

[Detlef Steuer <steuer@hsu-hh.de>]

Hi all!

This is really depressing. I'm using org since more than a decade.
In the early days using a git clone, since some years with package
from org-elpa, then melpa.

I have installed 9.5 with package-install in a clean emacs session,
it is shown as installed, too, but whatever I try, my org-version is
shown as 9.4.6, which is included in 27.2.
(I assume, and therefore citeproc unavailable)

The installation instructions here
https://orgmode.org/elpa.html
do not help me the slightest.

Same with
https://orgmode.org/org.html#Installation

I did exactly
---
Using Emacs packaging system

Recent Emacs distributions include a packaging system which lets you
install Elisp libraries. You can install Org from the “package menu”,
with M-x list-packages. See (emacs)Package Menu. 
--- 
but that obviously is not enough.

Really, really frustrated. May be I should step away from emacs and only
use nano or some such.

What is the magic I am missing? 

Any help appreciated
Detlef