Ah - I can releate!!! Sometimes it takes all I have to Let it Go - and I'm not great at it. Unfortunately, I am not good at doing those types of things like you.
It's hard to say not to build a resentment - I am still working on that little item too.
But - if you like to do this, do it - and do it well. Do it anyway that you want to walls to look, etc. I think submersing yourself in something you enjoy is healthy - plus, it helps to work out anger (at least for me it does).
Hope all goes well!!