Is there an plugin to train the app to generate handwriting fonts like this?
Or incorperate similar codes in Glyphs.
I would start to generate shapes outside of Glyphs, first. Just to get used to the system and see how useful it is. There are a lot steps that don’t need to run inside Glyphs (e.g. training with your own samples). After you have set up a system, finding a way to import them efficiently should be easy.