From about the 1940s to the 1960s he made many radio addresses that he wrote himself. He was politically very active, touring the country and doing a lot of speeches on his own.
As a president he absolutely had the best speech writers of his time, but he went over each speech meticulously and gave feedback the writers claimed was expert and welcome.
One of his speech writers actually published a book that showed photographs of Reagan’s own handwritten notes for his speeches. There are thousands of them in his presidential library.
> As a president he absolutely had the best speech writers of his time,
He was both much better (as a writer) and worse (as a law-breaker) than your depiction of him.
"Ronald Reagen was probably innocent by way of Alzheimers"
A lot of people who met him during the last two years of his presidency described what we now know to be early symptoms of Alzheimers. He also came out publicly as having it not 5 years after leaving office.