I create stuff or fix stuff. Communication has never been a part of my job description. Communication has always been implied in your job description. If you expect to advance into management, you'll have to be a good communicator. Speakers are born, not made.
Good speakers are confident.
Planning, Practice and Perseverence develop confidence. Plan, Practice and Persevere and you will be a good speaker. If you stumble, you can work yourself out of it. Finish well and the stumble won't be remembered. You won't have to go into the Witness Protection Program.