11 months and not crawling..

My 11 month old refuses to crawl.. she rolls and sits up to get where she wants to go. She’ll get on her hands and knees then plops on her belly. I don’t put her in type of walker or baby container so she will move around the floor to learn to crawl. She doesn’t even pull up yet. She sometimes reaches for the couch or me when I’m on the floor with her and kinda pulls but doesn’t move her legs to stand up. I’ve tried moving her hands and knees for her to mimic the motion but nothings clicking.

I know every baby learns and grows on different paces. My two sisters and I have babies within weeks of each other so it’s hard not to compare my baby to theirs… their babies have been crawling since 6 months.. just hope I’m not anything wrong and not helping her develop and grow.