Since you’re on EndeavourOS, I suggest using btrfs-assistant instead of timeshift, since it was created by one of the devs and offers more functionality with snapper. Just create a new profile for your root partition and then configure how often you want it to take snapshots.
You can also install snap-pac so that you get OpenSUSE-like automatic snapshots everytime pacman executes a install/remove/update command.
I use https://huggingface.co/chat/, which is an open source alternative to ChatGPT.
Their privacy policy is here.