First BMW: What should I expect?

Went to dealership today and left the lot with a 2017 330i L4 2.0 at 72K miles. I am new to BMWs honestly, but at the price and miles, couldn't pass it. I always thought I wanted a sports coupe, but turns out, a sports sedan is what I really wanted.

Now that I have it and to avoid that "BMW mechanical fear", what tips should I know to maintain it? My previous car was a 2013 Nissan Sentra and it sits at 155K miles. I put a good 50K on it I believe for college and work with zero issues besides normal maintenance.

I can do basic repairs also though I know there is a learning curve. Just want to know what I'm coming into from experienced BMW owners.