I am a blood bought follower of Jesus Christ. As such nothing can shake my faith. We already know there are. reared beings outside of our planet - angels and demons. I think the UFO phenomenon is demonic in origin and Satan is clearly capable if producing artifacts to bolster the deception.
But even if there are other beings inhabiting our universe why would that shake my faith? God has told us all that is necessary for our salvation. He has not told us all He knows (as if that were possible). l
We have been told our struggle is with powers and principalities and there is great deception coming. I choose to cling to Christ my Rock and nothing can shake that - because it is His strength not mine.
People have, on the other hand, committed suicide when faced with idea of ETs. It happened when War Of The Worlds was aired, and it happens when service members clean up an ET crash.
You will be OK.