Hello Maria Diana

Have you seen this book on Google that you can access?:

Hammond, J. (2016). A George Orwell companion: a guide to the novels, documentaries and essays. Springer.

https://books.google.co.uk/books?hl=en&lr=&id=1rcYDAAAQBAJ&oi=fnd&pg=PP1&dq=Material+about+George+Orwell+and+his+essays&ots=kGmWr5iGrm&sig=cPjrkxT7pWnY71FuCKjeiRaKZZA#v=onepage&q=Material%20about%20George%20Orwell%20and%20his%20essays&f=false

These are ResearchGate members who have written about George Orwell; if you had particular queries, perhaps you could ask them on ResearchGate:

Article Why Do We Still Read George Orwell?

Article The satiric techniques of George Orwell /

Very best wishes with your dissertation,

Mary

I would read and interpret “Animal Farm” and “1984 + movie” from a geopolitical perspective. That will give you a big head start.