I like Pandora a lot, and what I wanted was a better version of Pandora (more songs, better sound quality).
Here is my experience with Apple Music:
1. "Choose artists for you"
When you first start up the service you need to tell it what artists you like. You can't just tell the program directly, you have to pick from a list. If you don't like the things on the list you can get it to give you a new list - it took be about half an hour of new lists before I got a bunch...