I watched a few talks from Sam Aaron, you can find a ton of them.

I would recommend this playlist to get started: https://www.youtube.com/watch?v=4BPKaHV7Q5U&list=PLaitaNxyd8...

and the help > tutorial section of sonic itself.

Those two are just amazing: https://youtu.be/a1RxpJkvqpY, https://youtu.be/GPan4gRSwZs