Hi, these are a great question and a right conclusion. But become the good communicator is only a small thing that you have to change about themselves.

Here are just several points from my experience. 1) You have to get as much responsibility, as you can. 2) You have to became confident and tough. 3) And Yes, you have to became a better communicator.

Finally all these are about working on yourself. I can recommend you this book, which really helped me: https://www.amazon.com/Unlimited-Power-Science-Personal-Achi...

By the way it took more that a year to change yourself ) Good Luck!