Of course, I come from a very different religion than you do, and you may feel this is very old-fashioned: but, I want to share my experience, and hopefully it will help you. I don't expect you to do everything we do: but, you could probably take some idea from it.
In our house, the head of the house who is the man of the house says grace for everyone. When a woman wants to say grace, her head must be covered in showing her deep respect for the man, the superior one of the house. If a girlchild wants to say grace, she must do the same. If a boychild wants to say grace, he does not have to wear a head covering, as he is a male. Usually, the father says grace unless he gives permission to another in the house to do it. Or, if the family wants to take turns saying it, and the head of household is fine with that, that can happen also.
Of course, when any of us are alone or eating with friends who do not share our beliefs, we can bow our heads and pray quietly: but, at home, this is how it is done. It is also different for single parent households, as the woman would obviously be head of her children and would not have to wear a head covering while praying.
Our graces are not ritualistic prayers. We just say what comes to heart. We thank God for our food, we pray for the brotherhood all over the world, we thank God we are able to be together and eat together as a family, and we pray for those who are less fortunate.
I hope this helps out.