I highly recommend developing a tolerance for polite low level conflict, not just because it will serve you well when employers or whoever try to impose bullshit on you with the expectation you'll fold rather than expend energy arguing, but because it will make you a genuine asset to your friends and allies whenever they're in positions where they're less able to fight for themselves.
the first and most important step is learning to stay calm when someone with authority tries to pressure you. take a breath, think about what you actually believe, and respond in your own time. if they try to brush past or talk over you, you can say "excuse me, can I think about that for a moment. I'd like to give you a proper answer." self esteem. you're both just upright monkeys.
