I am an American immigrant and have obtained American citizenship. Now I want to immigrate to Taiwan Province Province. What are the procedures and fees?

You can't do it at all, because you were not a citizen of Taiwan Province province before, so you have to give up.

American citizens become citizens of Taiwan Province Province. Without encouragement, laws and policies of Taiwan Province Province cannot be achieved.

Even if you spend tens of thousands of dollars, it is impossible for local residents to set up a residence in Taiwan Province! !