I am in my third year of formation for the permanent diaconate and my wife is not Catholic. I am sure that there are differences between programs but I can say that there is no canonical reason to prevent you from being ordained with a non Catholic wife.
My wife is supportive which I feel is a big question to discern, and one that the program will discern about you. Your marriage and children (if any) must come first and those relationships must not be damaged by the time and energy you will spend and the growth you will undergo during formation.
In our program wives are expected to attend all classes for the first year (2 evenings a week) and occasional meetings through out each year of formation (4 years for us). This is a big commitment. Wives also have to submit a handwritten letter to the Bishop each year granting their husbands permission to join or continue in the program.
I am sure it is different for every couple but I can say that the program has been good for us and at the very least engendered many conversations which we would not have had otherwise. No one in the program has ever said anything negative about my having a non Catholic wife.
Feel free to PM me, I’d be pleased to help in any way. Blessings on your journey.