My elder daughter (now 3 yrs old 9 months) didn't like moving around and crawling when she was 9-10 months old. She likes to sit by a cushion and play her toys quietly. She can stand up with support when she was 10 months old, but she didn't walk by herself until she was 15.5 months!
But for my 9 months old son, he starts sitting up by himself when he was 7 months old, and is now crawling around the house, standing up with support all the time. I think he will start walking very soon ...
I think every baby is different so you don't need to worry too much.