pyenv basics
As usual, Real Pyhon has an excellent tutorial about the topic: Managing Multiple Python Versions With pyenv – Real Python
pyenv install 3.10.0 # install python version
pyenv global 3.10.0 # set it to be the global unqualified `python3` one
pyenv global system # reset back to whatever the previous system default was
Nel mezzo del deserto posso dire tutto quello che voglio.