background is not required but interest matters. I think you should establish first whether you can carry philosophical concepts with you or not. All of your questions come afterwards. have a look at past papers and go through 'history of western philosophy' by Bertrand Russell, if you find it digestible, contact me, i will guide you through rough though enjoyable sea of philosophy

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Hasta la Victoria Siempre - Commandante Ernesto Che Guevara