Need to get better at communicating

Hi, I dont make a lot of reddit posts so I hope this is all up to standards. Basically my issue is I (26F) am having issues communicating with people. May it be my significant other, friends, or coworkers, I always feel like im either not getting my point across or im not communicating properly to get any satisfaction from the conversation itself? An example would be like a coworker at work said I was doing something wrong and said another way of doing said thing. The thing they said is also not correct, so I said you know im not entirely sure about that, and instead of trying to find out together the correct solution they basically said I was wrong and refused to say anything else so I just dropped it and did it the way I was taught, even tho they said that was wrong. I guess really im just wondering how to deal with people getting defensive with you in situations so I can appease the situation amicably and we are both satisfied with the outcome instead of me just shutting down and dropping it out of severe hate of confrontation?