I've mentioned this in my other replies that I'm noticing a theme about the reasons as to why people from different countries migrated to the United States. It seems to be the common theme that people came here for new opportunities. It's interesting that this reason is shared amongst people from so many different cultures. The United States is painted as the land of opportunity. In the case of my ancestors (who came from Ireland), it seems likely that they migrated to escape the famine that spread throughout Ireland. In a way, it could be said that they likely migrated at the prospect of a better life.
The story of your grandmother is quite inspired and impressive. Raising children in the United States with a language barrier