Read books by Gary Provost on writing. Writing Tools by Roy Peter Clark. Draft number 4 by McPhee. They contain a variety of ideas. Writing Tools is great if you want to identify and drill techniques. Provost's books cover everything and are written well.
You might be interested in Meta’s Demucs, which can split a song into drums, bass, vocals and other stems. It’s really very impressive, I can’t quite believe such results are possible!
You can try it out at https://huggingface.co/spaces/akhaliq/demucs if you don’t want to install it. If you google “source separation” there are a bunch of hosted services which mostly use either Demucs or Spleeter (which was an earlier, good but not as good, system from Deezer)
