L have similar hands with three of my kids except for one. Does that mean the kid is not mine. We have no similar features.

Means absolutely NOTHING.

Genetic information come from both parents.
You'll notice that not all children look exactly liked their parents.

It means their features are not the same as yours, I have 5 sons, you line them up and pick the one that looks most like me, guess what, it would be the one I adopted. Looks can come from both sides of the family, from several generations ago even.

Your chromosomes split and rejoin equally; genes on them do not. It is totally absurd to be concerned about any of this. If you fear you are going to act less like a loving parent over this, get DNA from all of you and send it in for not too much cost. There are several DNA test online sites.