Was the old Tails updated, too? If so, does it still works fine?
If you already have one working Tails USB stick and need another Tails USB stick, please consider using the app “Tails Cloner” in Tails to clone Tails to a new USB stick, following the instructions here
Deliberatly installing an old version of Tails is bad for security, and I don’t know where to download older version of Tails. Tails team only makes the latest version available for download on website, and not every version is captured by web archiver.
You can also try first booting a Linux Live OS (you only need to write the ISO to USB disk with Rufus or BalenaEtcher and boot it, Live OS would let you experience Linux without changing stuff on your hard drive), and follow the instructions here on how to install Tails on Linux. Note you need 2 USB disks (1 for Live OS of your choice and 1 for Tails) to install Tails in this case.
Since the instruction uses GNOME disk utility, it’s recommended to download Ubuntu Live or Debian Live GNOME so you have all the necessary tools at hand immediately after the Live OS boots up.