M.
I had a family bed with my first son, and started to transition him when he was 7 months old. At that time, he was moving around too much for our comfort. I started by doing a bedtime/naptime routine where he slept in his crib until he woke up the first time at night. Then I often brought him into bed with us. At about 10 months to one year, we started to work on his sleeping through the night by having my husband go to him and soothe him back to sleep by sleeping next to him on a mattress. He has now been in his own bed and room since 15 months.
With my second, we had a partial family bed. My daughter slept next to us or with us until we went to sleep and she woke up the first time. Then I brought her into bed with us. Unfortunately, my son jumps into bed with us in the morning and I am afraid he will injure my daughter, so we are transitioning her to a crib sooner. We are starting at 4 months - and I do miss her, so I still bring her in for part of the night and try to get her back into her crib before my son wakes up. Ultimately you have to do what is best for you.