What You NEED to do is build a vocabulary of the things you need to say. Drawing shapes is good for manual dexterity (like learning to make the french “rrrrr” sound) BUT if you want to be articulate, you have to build a vocabulary. By drawing LOTS of stuff.
Alphabets and Ideographs
Christina Wodtke

I completely agree. This is great advice, and everyone you mentioned so far has pretty much given that same advice.

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