is that where i should be looking at the start is the tagger, if you dont mind can you let me know where to look
I don't think that you need tagger at all, it's useless cause we have more than enough packs you can download to start the game and test it. The logic of the game is written in Python, content partly in JSON and partly in Ren'Py script.
The whole game consists of many concepts that are intertwined, learning all of it even if you know Python really well may take weeks, so I guess you need to figure out the basics and find something you'd be interested in to work on, there are many, many options.
For a lot of stuff you don't even need to know Python, just have some imagination.