How to be an authority in extraterrestrial civilizations and alien contact.

Let me give you some advice:

FIRST: Anything people see in the sky, can be some extraterrestrial spacecraft. Now (this is important,) if someone says that the flying object is just a balloon or a airplane, or Venus, the individual in question is a CIA operative, a cabal, a psyop, a debunker, well, you name it, but be aggressive, hostile. Attack him/her. Remember that there are no persons who think differently, but only enemies.
Keep in mind that you are fighting against a monstrous conspiracy, a shadow government and the whole scientific establishment. They spend billions of dollars denying what you say about the ET in the Internet.
However, the “star craft" (UFO) can be some obvious hoax.

In that case, it's better to remain silent or to go on talking about the Cosmic Brothers agenda, and keeping your believers hopeful and expectant. 

Find some other sighting and write as if the Alien Landing or the Disclosure will happen in hours or days.

Remember this: you know more than "them”: (NASA, Scientific establishment, governments, UN, etc. )
If someone asks how you learned so many things about the Cosmic Visitors, just smile, or tell him about your Close Encounter, or your telepathic communications with the ETs, or your visits to Mars. If the curious asks for evidences, attack him or her. Put in practice your ad hominem fallacy (See above.)

Second: Invent pseudo-events with big names like Galactic Exopolitical Multiversal Congress.Create the Galactic Diplomacy University. Remember that in the Internet things always look  bigger.

Tell your fans that some anonymous source, perhaps General Z,  informed you abut the Extraterrestrial Quarantine imposed by one hundred different ET races to our planet. Ask for a disclosure.

Frequently use the word "quantum". It always sounds fine. Do some Google on stars and put funny names to your Aliens, something like Betelgeusians, Rigelians, Aldebarians or Bereniceans. Forget about distances. Do not care if the planet of your aliens is a billion years light  from our poor little Earth. Nobody will ask you how they came here.  (If someone does, just smile and move your head.)

Of course, read what other Cosmic Preachers are doing. Learn from Raelians, Exopoliticians, Councilors of Earth, channelers and contactees.
They are of course saying and writing the same things that you, but tell your followers that all the others are just disinformers and psyops, or are puppets controlled by the Military-Industrial-Extraterrestrial Complex.

THIRD: Always improvise and make predictions. Remember that the next year nobody will remember what you said before. Probably your followers will be doing something else: opening their chakras through guided meditation, or waiting for the second coming of Jesus.