Super easy to use:
unpack BepInEx5 x64
to the game folder as in this install guide https://docs.bepinex.dev/articles/user_guide/installation/index.html
then place the mod in the Dustland Delivery/BepInEX/plugins/
folder
Now when the game runs BepInEx also runs, and loads the mods.
A config file is created at first run at Dustland Delivery/BepInEX/plugins/DDTweaks.cfg
edit that as needed, and re-run the game