5month old baby girl. Something wrong?

Hi my 5month 8daysold baby girl is not Turning sides and not turning from back to tummy... if i only turn her side she cant lift head herself n lay on tummy she need very light support to lift her head to lay on her tummy... but the following things are she able to do Making different sounds like coo Holds her head without support (slightly shake) Follow moving objects: Turn head in the direction of sound Smile at people Laugh n giggle Different types of cry Get fussy n act bored if activities doesn't change Recognize people at distance Distinguish my face from others Calming herself by putting her hands into mouth Hands n legs activities are lot she try to move by kicking her legs n beating hands on surface Im worried a lot like why she is not turning herself and lying on her tummy please suggest me something is it normal or something wrong?   she is able to sit with support