"A woman is a person."
You are totally fine! There is no right way to learn. One thing you can do is find your learning style and incorporate it into what you are learning. For example, I learn using music and visualization. So, I learn what they are saying by creating a song or picturing it in my head. I hope this helped!
My understanding is that it tends to be pronounced kind of like "imnida," probably just because it flows nicer when you're talking fast. I haven't watched this yet, but I've seen this video floating around youtube that seems to actually be on that exact topic https://www.youtube.com/watch?v=z1L67WJWFE8