Will we find extraterrestrial life before we all die? No, because somebody just died somewhere even as I wrote this sentence. I think you really want to know if we’ll find extraterrestrial life before you die.
This is unknown. We don’t know if there is life on Europa or Titan or other moons around Jupiter or Saturn. It will likely be many, many years before we can send an appropriate probe there that is capable to drill through many miles of ice to the liquid water underneath. Drilling that deep, taking samples, bringing them up to the top, analyzing them and then transmitting the results back to Earth is way beyond our present capability.
So I think the answer to the modified question “Will we find extraterrestrial life before you die?” is no. It is not likely we will have that capability anytime soon. We are left to wonder without scientific evidence for now.