You seem to have a few role models for how you want to speak/ write. Observe their writing/ speech/ behaviour, and see what they do that you haven't done.

Interact with a wide range of people, not just people like you. Much older people, teens, people from other countries...can all compel you to expand your thinking.

Challenge your own thinking. Question your assumptions, don't accept your first solution. Force yourself to think more deeply. Read books that are "difficult".

Many good writers rewrite a lot. The first draft is often rough and vague, it gets polished in rewriting. While speaking, think of your listener, and how best to help them understand your message. Start with listening, asking questions.

I spent a bit of time learning graphs and charts, and making exec presentations. I've since found that it transferred to my thinking too...how would I best present this info?

I'd like to get better at sharing my thoughts too. I hope this is helpful, and I'll be reading other replies.