Welcome to the forum . you might use one of the many different methods of past life regression . See if you can get more details . Info that is less commonly known . You might also see if you can play a getar or piano .
ps , if any one hear does not know who John Lennon was or Yoko Ono is .
https://en.wikipedia.org/wiki/Yoko_Ono
https://en.wikipedia.org/wiki/John_Lennon