u/Large-Ad5643

Hey, I have a 14 week old son and a 15 month old daughter. I sleep trained my daughter at 13 months old and it was a lot easier than I thought, we used the Ferber method and she got it by night 3. I am reading the best time to sleep train is 4-6 months old, does anyone have any success stories on this? I feel this may be too young and it was so successful with my daughter because she could understand simple commands at 13 months old, is it just as easy for a baby 4-6 months old?
Thank you xx