Putting to sleep at night....sleeping through the night?

So my little guy has still been rocked to sleep every night :/ it just breaks my heart to hear him cry so I pick him back up every time and do it again until he lets me put him down. It usually doesn’t take too crazy long...maybe 15 minutes tops? Anyway, all my coworkers are staying I need to start sleep training. He still wakes up throughout the night but I realized it’s not because he’s hungry- it’s because he wakes up and is alone and cries for me to rock him back again. He was sick last week so I let him sleep In bed with us and he slept all the way through the night because he was with us. But anyway, what sleep training method worked for everyone? Are your babies sleeping through the night? How did it happen? I was reading up on Ferber- anyone tried that? Anyway I am clueless- just let me know whatever you did or whatever worked for you or any feedback!