Why can't it be just
$ curl -L https://ooni.org/install | sh
similar to https://nixos.org/download.html#nix-quick-installThat'd be a great addition! Give it a try and implement it: https://github.com/ooni/probe-cli/new/master
Don't forget to think about all the different OSes and the way the handle scheduling!
Also, make sure you're not on a network where someone will report you for visiting the "wrong" websites. It does requests to a lot of websites you don't want to be caught with in your history.