Hi @FadyHabib - not sure if you have done the presentation already or not but if not here are my suggestions:
-Write down some broad topics that interest you - are you interested in environment, social, health related research for example? It's most fun to do a project when you are interested in it!
-In areas that interest you, have a look and see what data is freely available for you download and use - sometimes the hard part is finding good open access data so if you can first see what is available then you can build a question around that. This varies a lot depending what topic you are looking at, and what area of the world
-Once you have found some data, try to build questions around it. Keep it simple and think how you can use GIS to find an answer to a question, perhaps exploring a potential relationship between two datasets
Good luck and have fun!