Mussar has been incredibly helpful in my understanding of all aspects of producing (i.e. sound design / composition / music theory). He has a knack for explaining complex musical ideas in a very clear and understandable way. He can fit your needs whether it is explaining broad concepts or mechanical details within your DAW/VST. I fully recommend his teaching for any beginner, and can see myself taking lessons through more advance stages in my musical career. If you enjoy his lessons on Youtube or Twitch, his private lessons are perfect for you.