We’re still holding/feeing our baby to sleep then transferring him to next to me crib when he’s in a deep sleep. Not going to attempt any sleep training until he’s out of this sleep regression period and probably in his own room in a few months. We did try soothing him to sleep in the next to me for a few nights, which took a long time but worked eventually, but I’m definitely not ready to let him cry either! Emily Oster/Parent Data has some good info on sleep training.
My now 3 year old was older when we did this (around 8 months I think?) but she got to the stage where she’d wake every couple of hours and only go back to sleep with boob or a bottle. When she woke I would go in and pat her bum until she went back to sleep as she got so reliant on being picked up / fed to go back to sleep. The first night took 2 hours constantly before I managed to leave the room but she then stayed asleep the rest of the night, night 2 took 45 minutes and then night 3 she slept through. She for the first few minutes of each time wasn’t all that happy about not being picked up but equally I wasn’t leaving her to cry if that makes sense. Shush Pat method if you want to google it.