thanks to all of you, was able to change settings with image output much to my liking.
Used flash because my kid was inside the "tunnel" thing so exposure was not proper othewise

In the pic below i used the A-mode to get the max aperture at the focal length

this is also centre weight, 100 which would have come out perfect if i would have changed the autofocus mode

in few other pics also i realized that focusing was not apt. Changed the settings to 3D and AF-C. then it came out well.

any other comments would be more than welcome.