You know… I know a lot of my colleagues who are unhappy with what they do and how they do it. But why? My own guess would be that they simply are unhappy because they made it that way, so how to find yourself inner peace to learn, study and work? 
 
The thing is… Look at the world from a different perspective , look at yourself from a different perspective, people around yourself do not like you? Ask yourself, should you be changing yourself then? Stop stressing yourself out on stupid things when you get home. Arguing with your son or husband counts too, try to settle everything so that it fills you out with pleasure. 
 
Do not be stubborn to accept not other people’s opinions but do not be too soft to be perfectly fine with what other people say either. The thing is you have to change the way you look on the world, be happy, why? Why not ? Take a hold of what you are doing with passion and be happy about it.  
 
That is how I found pleasure in every hard job there is to be done.