LOVE audio dramas! i used to be crazy into tma but i thought about it too much and burned myself out LOL so i can't listen to it anymore. archive 81 is a big favorite, the seasons are all connected but each have their own story and world, so if you aren't into the first season i recommend listening to the third one and seeing if you like it better. wolf 359 was the first audrama i listened to and it will forever have the number one spot in my heart. ars paradoxica is also a really fun one! i have not listened to malevolent yet but it's on my list :)

re: mindless stuff, i looove tetris/minesweeper/solitaire/snake while i listen to podcasts. i don't know if this really counts as 100% mindless but i used to play minecraft and slime rancher a lot, and for tma specifically i would play stardew valley for like 7 hours straight every day while i was listening to that. knitting is nice for podcasts too but i haven't done it in a long while T_T