Sleep training 2 month old

J

I came across this article and the method used sounds pretty easy to execute (although the actual process might take a while). Just wondering if anyone has tried this method before? If so, did it work and how many tries did it took?

https://www.google.com/amp/s/www.todaysparent.com/baby/baby-sleep/2-month-old-sleep-training/amp/

G