Sleep training?

My daughter is 9 months old. We’ve been cosleeping since she was a newborn. It’s just what works for us and she sleeps great with no problems, but I’ve heard over and over that we need to get her in the crib because she can’t sleep with us forever, which I understand is true. So I decided to start sleep training with the cry it out method. First, I started her with napping in the crib and she did great. But, once it was night time and I put her in there, she screamed and bawled endlessly. It broke my heart and I couldn’t stand it. She was crying so hard that she couldn’t even catch her breath. So needless to say, she ended up back in our bed. Am I wrong for doing that? Should I be more serious with the sleep training? Or do I comfort her by letting her sleep with us? I just need help 🤦🏻‍♀️😭