not be afraid to speak up when i have an answer/idea/opinion

or more to the fact not to feel stupid after I say something. I would love to feel for once that my opinion is as good as the next person whether they agree with me or not. And not to feel squashed or inferior after a person who is coldly and strongly opinionated makes their statement. Which then I end up being afraid to speak up the next time when I have an answer or idea or opinion. I just back off, how do you get to that point of being so strong in your opinion that no one else’s opinions, even if it is against your no matter how strong theirs is, does not shake your self-confidence and make you feel like you just want to slide to the background and disappear in shame and embarrassment? Not saying it’s the opinion speakers fault( sometimes I think it is) but I want to be able to be in that spot of no fear and not shrink even if it is a right opinion that I need to except, spoken by the other person.But I don’t want to become cold in getting there either as some people are, I want to share my opinion in love not destroy others as I speak it. I did not take debate class in school because I know I could not win at a debate. I would end up constantly feel like I was hated and thought of as being stupid.