I am in RCIA now with my husband so I understand both the Protestant and Catholic mindsets and worldview.
Many issues have already been raised that you need to think long and hard about. One that I think is especially critical is the natural family planning (i.e., no artificial birth control) stance. Thankfully, this won’t ever be an issue for my husband, but there has been several recent threads involving couples of mixed beliefs that *thought *they were okay with the NFP. However, they find themselves years later in situations where either NFP is not reliable for them and/or where another pregnancy could be VERY dangerous for the wife’s physical and/or mental health. At that point, a HUGE problem arises because one side (usually the non-Catholic one) doesn’t want to forego marital relations and thinks,
“What’s the big deal about birth control?” 
You both REALLY need to be on the same page on this issue if marriage is in your horizon.
I’d also say that you really need to seek to understand her faith. I honestly cannot imagine a non-Catholic being so nonchalant (and uninvolved) about the religious upbringing of a child, a precious soul entrusted to you by God to nurture. Catholicism will permeate your home if she is serious about her faith. Again, though, you need to know and understand that faith, in advance of making a life-long commitment.
Start reading and researching it now so that you can have intelligent conversations with her about it. It never hurts to expand one’s mind, especially about an area that is so important to her.
(I’ll caveat this and add that I think once you do learn more about the tenets of the Catholic faith, you may find yourself on a fast track to the Catholic Church like my husband and I did

)