Time to learn a new language, unless you're moving to Ireland or Malta I guess. Tons of people come to Germany and are shocked when not everyone speaks English.
Anyway, I think you'll get better answers if you specify a country. The EU is quite diverse, so I don't think there's a ton of advice that'll be true everywhere in the EU.
So is Irish, but the point was that English is an official and widely spoken language in both countries.