DietPi is an operating system based on Debian that provides optimized experiences for installing and using common software.
Follow the instructions at https://dietpi.com/docs/hardware/#basic-information.
Please note the following from Indiedroid community user Alexander Mundy on the #indiedroid-nova channel of the ameriDroid Discord server:
Finally got DietPi going. DietPi is one of my favorite OS. 2 things I was doing wrong during conversion. 1) Was using WiFi instead of Eth0 during install and the installer removes network driver 2) I was doing apt upgrade before install which caused systemd to change to a newer version that the installer would not use. BTW, WiFi support works fine once set up in DietPi. I haven't checked audio. Interestingly enough, the Nova bug of a shutdown causing a reboot followed into DietPi for me.