We swaddled our son from the beginning through Harvey Karp's advice. That helped him sleep better. He didn't start crawling until 6 months, and started walking at 10 months. He also has a huge vocabulary and loves playing his ukelele and making up songs too
Thought that was an interesting similar story to Kizudo's
I wouldn't put any thought toward your child not weight bearing yet. I don't know how much your child weighs or how tall he is, but I'd imagine, the more he has to "hold up", the harder it would be?? If Doman is saying that your child should be doing that by now, just remember that every child is different, and every parent's effort is different.