Ukraine is on the other side of the world from the USA and we have no important interests there.
Did we have an important interest in Austria in the 1930s? How about Poland? What about France? What about Northern Africa? What about Russia? Did we sanction state adventurism when Germany was doing it?
I don't think Reagan thought of the Ukraine as of no interest. He cared about everyone behind the Iron Curtain and wanted them to be free to live out their own best destiny. Do I think he would commit all our troops to the defense of the Ukraine? No, but I do believe he would be taking it to Russia big-time in the media, and doing whatever he could behind the scenes to help.
Ukraine was also part of Russia going back a thousand years. Crimea was moved from Russia to Ukraine during the 1950s by Khrushchev.
Who moved Crimea from Russia to the Ukraine? The Politboro did it. Khrushchev as merely the mouthpiece. If they hadn't wanted him to do it, it wouldn't have happened. And if he had tried without them, he wouldn't have lived on in retirement..
How America acquired PR is an interesting story and not in a way that supports your point.
That could be. None the less I do believe you are sharp enough to understand the difference between U. S. medling and Russian medling in this era.