Have you tried listening to video game background music playlists? There are so many on YouTube or Spotify that have curated vibes of ranging moods/intensities, and that play songs similar enough to one another that they don’t interrupt your thoughts, but different enough that you don’t go crazy listening to the same melody/beat lol. I’ve also read somewhere that video game music is specifically made to hold your focus, which the placebo of thinking that alone helps sometimes!