Tell me of your teracube 2e zirconia upgrade in 2025

Can anyone ,who is not tech savvy, please tell how easy it was for you to upgrade (Android authority taught me this means when phone jumps from one android version to another) your teracube 2e zirconia.
tell how it looked, did It show ‘new update to Android 13 available’ ?
I’m looking for easy to follow information so I can be ‘able’ to understand.