How should I go about "deprogramming" people?

Hi! I am a new leftist and would like to know what approaches should I use when deprogramming/radicalising people. All my attempts so far at getting rid of the anti-communist/racist/sexist/etc brainworms that my friends/family have, have been completely unsuccessful. I know that not everyone can be radicalised into becoming a leftist, but still, what should I do to at least slightly alter the worldview of the people around me? I'm sorry if this is too generic of a question

the fact that i live in poland probably doesnt help, even saying somehting vaguely positive about socialism here makes people think that you at the very least lost your mind lmao