If you followed correctly all the steps, when you enter the load menu of season 2, you will see all the saves of season 1, but remember that only the one you saved at the end of season 1 works.
Viewing post in Young Again - Season 2 ( Ch. 7 ) - Public comments
For myself(being on the Steam Deck), I had to go into the games save folder and copy the save from the 1-14 over to the 1-3 empty game saves folder. I had 2 specific saves from the end of ch 14 that i copied over. Then just booted up the ch 1-3, and those save files were there to load and continue from. This should also be easily doable on Android, you just have to find the games folder/files.