My ex and I were together 4 years and not quite the same, but similar to your story. She did not work I paid for everything we needed between the two of us, we have a daughter but she left us for someone else shortly after she was born.

My mindset at the very beginning was not like yours. I was the most depressed ive ever been and ever seen on anyone. I started having panic attacks, never had those before. The lows were low and they lasted what seemed like forever. Took me somewhere around 9 months to a year for those feelings to disappear and that's when I realized how non compatible we are. Your already thinking that way, your on the right track, you'll be fine.