I am trying to write my first research which is a qualitative study based on only secondary data (action research) . I have a difficulty with building a theoretical/conceptual framework
I'm not sure if I understand it right - you need to have a framework for studying impact but what do you mean with impact? If it's more about personal experience than IPA or some Hermeneutical analysis would be your go to. For example Pietkiewicz and Smith published an article with IPA guidelines, that's probably a good starting point.:
Article A practical guide to using Interpretative Phenomenological A...