I like your initiative to do this! More men should.
How to make cleaning fun? For one thing, always consider the pleasant results of this work. Dont most people LIKE having a nice, clean home? I sure do. Imagining how nice it will feel when you're done should help.
Second: make a game out of it. Pretend you are a student in a school for cleaning. As a good student, you want to educate yourself about the subject.And do just that! Read articles about house cleaning, and learn all the tips and tricks to make the work get done more quickly, what works best, etc.
In your situation, imagine how much your wife will appreciate your work. I know I would!
Some people just like cleaning. Others have to be "led" into it. That was me, 3 and a half years ago. I didnt use to care about cleaning, but after a major illness and surgery, I noticed how grubby my home had become. I started cleaning. At first I did a horrible job of it, because I didnt know what I was doing. But over time, I figured out how to make it go well, and THEN I started to enjoy cleaning. Now, I really love my work, and it is what I do to earn a living. I could still be working as an RN, but in my state, nurses don t make much more than what I make cleaning. And nurses are treated poorly. Who needs that?
Good luck, and let us know how you're doing.