Hello everyone Can you tell us, for the past 8 months, have they start…

Hello everyone Can you tell us, for the past 8 months, have they started crawling at 7 months old in a playful way? Question: will the child learn to crawl on all fours by himself or should we teach him? And still, we haven't sat down yet, is it normal? We don't sit ourselves, I heard that children will sit when they are ready.