How can I change the society I live in?
You asked: "How should I behave, when I cannot effect change that I want in society?"
Answer: I suggest you read the four Gospels again, to see how Jesus behaved, when He wanted to change society, but they would not listen to Him.
The thing I notice about Jesus, is that he did not seek an official position, nor did He encourage people to protest violently.
He spoke to crowds, and to people 'one-on-one'.
His work was to "Influence" them. He tried to help them look at life from God's point of view.
He told parables, they were 'earthly stories, with a heavenly meaning' that helped people change.
If you influence people to change, and follow Jesus, you will be helping to change the society you live in.