It's just like learning any unfamiliar programming approach. Array processing has a long history, and it's supported by languages like R which are heavily used

It's just like learning any unfamiliar programming approach. Array processing has a long history, and it's supported by languages like R which are heavily used in data science. Once you understand the different uses of [] operator, it becomes second nature, and you realize how useful vectorization and broadcasting can be. Also, manipulating live data is an excellent way to learn about your data and figure out what you need to do. Python is a dynamic language, so interacting with a rich REPL environment makes a lot of sense.