Girls, hi ?, what do you think a baby should be crawling actively at t…

Girls, hi ?, what do you think a baby should be crawling actively at the beginning? Then sit or sit he can earlier? My daughter is 6 months old only but he's been active since five months and straight up raises his head and holds his back straight wants to sit like it's a press that's pushing him like that straight stretches, I'm putting her down but hold her tight can I? I'm afraid to put her down, but still put her down and she doesn't want to lay her head down