The sooner you start, the sooner you'll be done with it and the sooner you can stop thinking about it. Go on, up you get, it won't be as bad as you think.
You won't want to do it later either. You might as well just do it now. Even if you don't finish it all, anything you manage to get done now is something you don't have to do later (when you still won't want to do it)
Just do the first little step now, and then it will be easier to finish later. Or you might get carried away once the barrier of transition is gone, and keep going for a while.
