Sleep training method?

Hi ladies! By now we’ve got little ones nearing the age appropriate to start sleeping training. I just wanted to see which method you were all considering, as our pediatrician recommended CIO.

Our Jack goes to sleep very easily at night, but he’s only sleeping a 7-7.5 hour stretch for his longest, waking/fussing around 2-3am for a feed, and then going back down for another 4 hours. I am dreading hearing my baby scream at 2-3am for god knows how long when we sleep train him at 16 weeks. 😬😬😬