Don't put so much pressure on her to develop certain things by certain times. All babies are different. She won't be going to school not being able to do these things lol. She really will do it when she's ready. It's amazing the amount they learn to do physically the first year or so! 😀

My little boy has only just started sitting on his own at 8 months and he seems to have done everything all in one go so I wouldn't worry she might just surprise you and master all them things at the same time x