this is so amazing! :) ive seen a lot of people here diss marriages of people with different faiths, but honestly, i think even if your husband changes his mind about converting, he just might later!
my mom used to be a different religion but she converted when she married my dad, and shes one of the most grounded people in the faith i know. i think having the different religion before really opened her perspective to catholicism and its refreshing compared to my dad, who is almost excessively strict. they both follow all the orthodox rules and stuff, i just like the way my mom treats it better!
a family friend of ours also just converted to catholicism after being married for i want to say at least 15 years, so it is possible!
i know it seems your husband is pretty intent on converting, i just wanted to throw that out there just in case!
congratulations on this :D