How to make popcorn?

So I really like popcorn, but really don't want to eat the packaged microwave popcorn.

What the easiest way to make popcorn? I want it to be low in calories but taste great.

I looked into air popped popcorn and it looked simple, just pour some in a brown paper bag and pop it in the microwave. I can't cook for my life so thought I would ask for suggestions, before I end up with burnt popcorn.

TLDR: What the easiest way to make popcorn, low in calories and tastes great?

bon appetit