This is a really tough one to help with because while someone could post some basic code to get you there it would not be something I would want to run without improving the code and adding several checks within it to make sure things are working properly and the data is what you expect it to be each time. There are a lot of "best practices" that would not be in there if this just got slapped together.
I can say that anytime I need to use JavaScript with a code page I almost always use a library as I found it makes things easier. The really nice thing about this site I am going to link is it offers examples for every api call it handles.
https://tflanagan.github.io/quickbase.dev//#quickbaseAs far as what to look into I think you should only need to do a DoQuery to start off. You can either create your own query there or simply have a report ready to go that the api can call. You will need to navigate some JSON to get it done though as that is what this returns.
