There is one already.
https://discuss.eroscripts.com/t/how-to-get-started-with-scripting/2234
Frame by frame scripting is the easiest way of getting started with scripting and still get a good sync and don’t feel the stress when you miss points trying on-the-fly scripting. Use either JoyFunScripter och OpenFunscripter (both available in the software category in this forum). The guide is applicable for both of them even if the screenshots in the guide is from JFS.