Key-wise, I feel like there’s almost too much tonal information for everyone to hear it the same. If it was just up to the melody, I’d say hands down G major because the melody starts and ends on G the majority of the time (where has that pun been all my life?). However, there’s a clear E in the bass under the G at certain cadence points, making for a v chord (Em11) leading us back to Am, which comes on the strong beat. These are two good reasons to hear it in A Dorian.
Anyone who’s ready to take a deep dive into the world of mixing. You should be aware of mixing’s role in the music production process, but you don’t need to know anything about how to mix to take this course. You should be able to record audio at home and/or be comfortable creating audio in your DAW of choice. Once again, you can be a practitioner of any style of music, and you should get super excited when someone gives you a new song to listen to.