Part 1 of 3
Predicted on the computer being used for the above purpose Qualifies to run Ventura
The below links will help identify which version of macOS this computer may Qualify to run.
Computer Qualifying for macOS 13 Ventura
Part 2 of 3
Terminal command below will download the Full Version of Ventura 13.2.1 ( 12.6 GB ) and place new application called " Install Ventura " in the applications folder of this computer.
It will Not Auto Launch
softwareupdate --fetch-full-installer --full-installer-version 13.2.1
Part 3 of 3
Link below on Making a Bootable Installer
Bootable Installer.