I thought it would be easier to do so if one were close to a Ukrainian community. I work as a physician in New York City. I am a close observer of the Ukrainian community though not its member if one excludes the local credit union. In general I think that language preservation is a good thing. I would also like to point out that I am single and have no children.
Assimilation is a benign and actually progressive process.
Loss of language is a reality. It is a natural process and not evil. Language retention depends upon immersion at home and in one's surroundings. It also depends upon education and upon intelligence and desire. Money, as embodied in schools, helps.