A few years ago, I found the music genre Math rock (especially instrumentals) which has been phenomenal for whenever I have to be productive, since my brain is hyped and busy enough to not bother me with thoughts, but not too busy to be completely distracted. I swear it's like handing my toddler brain a tablet just to have a few minutes of uninterrupted time to be able to do some Adult Things like writing emails and uni stuff.
if someone is interested, I can drop the link to my Math rock playlist on Spotify
Edit: Here you go, a link for my little playlist with mainly Math rock tracks (aptly called "Traubenzucker", which is German for "dextrose" lol): https://open.spotify.com/playlist/30EWXxsm8mj2exYlne10Dw?si=D6kBAFemQe2BKiL9WWCPJQ&pt=f6f1836c5d7b6182ea91098653b5b127&pi=iC_J-yz6RrOie
I think this link only works for a week, so if the link is invalid, just send me a message and I'll send you a new one :)