Maharashtrian boy about to marry a Malayali Girl

I am a boy from Maharashtra who is about to marry a Malayali Girl. Our relationship is based on love and even though her parents initially disapproved, they have now given us their blessing.

We both work in the media industry and our families reside in Mumbai.

As I enter this new phase of my life, I am curious about what to expect and if you have any advice for me as I become a part of the Malayalam culture. Additionally, I would like to know the difference between Keralite, Malayalam, and Malayali. Thank you.