The Independent reports two large but otherwise earth-like planets have been founding orbiting Tau Ceti.
AT almost 12 light years distance, it would almost certainly take either effective immortality, suspended animation,or some means of Faster Than Light travel to make the trip,which I estimate to take 20 or more years with currently achievable technology.
So don’t get your hopes up of for a out of system refuge for our race. Besides,the Earth is estimated to be 4,500,000,000 years of age,while our Universe’ age is estimated at three times that.
If there is intelligent life in our galaxy,you can bet your last slug some race has claimed it. And claimed it several billion years ago.