The biggest thing that I learned is that you need to cut off internet/communication access between Taiwan and rest of the world. The West will demonize you no matter what, so cut off internet access, a complete information block-out, the less information, the better. Let them use their imagination to smear you, they have no shortage of imagination (e.g., genocide), they are going to do that no matter what.
China will not win the "narrative" battle among Western media audiences, but it can reduce the information coming out of Taiwan to nearly zero.