Kids follow what their parents do and not what they say

I am feeling anxious and guilty as I have not been setting examples of a good parent. Kids follow what we do and not really what we say. I have been screaming a lot lately at my kids, When they squabble, or to get them to do homework. And I know if I don't stop now(hopefully not too late) they will also scream to get things done! Another thing I need to do is spend more time with them, playing and giving them more space and time to play. Being a working mum and also with their school schedule doing this can be challenging. But just like everything that is important this has to be given importance. All is not bad. Good thing is I acknowledge this and willing to work on this, that is a start!