"I was not prepared for English to be so difficult to learn but hey ho that's life" It would be more commonly used as a dismissive response to a statement. Fred: "You should not have pushed that person. " Simon: "Hey ho"

Like the Dwarfs you could say: "Hey ho, it's off to work we go! " : ) Or like Joey Ramone you could say "Hey ho, let's go!" : ) Other than that I don't know !