For me, what caused me to have hope in revolution was by studying the theoretical aspects of class and class antagonisms which allowed me to understand that working-class revolution is inevitable, even if it doesn't appear to be. I recommend "The Communist Manifesto" for a short read, or "Das Kapital: Volume 1" or "State and Revolution," for longer reads.
https://www.marxists.org/archive/marx/works/1848/communist-manifesto/