Perfect English, funico; well done!
In answer to the question:
Prepare if possible if you will have to speak in public, but don't overprepare. If we are only able to speak or perform when we are very well prepared, then we will never gain practice in terms of speaking in a situation where we must be spontaneous. Take every opportunity to speak in front of others; only by facing our fears will we overcome them. In addition, only by practice can we hope to improve a skill that we are lacking in. Think about the situation logically: there is no reason for us not to speak in front of others, because each and every one of us will have our own unique contributions to make to the group, depending on our background, character, knowledge, and wisdom. However, in order for the words to be true, we must first believe them! Finally, use the nervous energy that you feel inside you not to freeze so that you cannot make any utterance at all, but instead channel that energy into inspiring the hearts and minds that you are speaking to!
☝🏽🙏🏽🤲🏽🔥🌞🕊️🌈🌠