The Hand of Friendship!?

As the representative from planet Earth, you find yourself standing on the barren, rocky surface of Valtor, surrounded by an eerie silence. The only sound is the gentle hum of the alien technology that brought you here. You've been briefed on the customs of the Victorians, but you can't help but feel a sense of trepidation as you face the towering, imposing figure before you.  N'Tari, the Valtorian representative, stands before you, its eyes fixed on yours. You notice that it's using the right hand to signal right hand to signal you with a single raised finger, and you wonder what this might mean in his native language... you know what it means on Earth, but are hoping for something different with this alien race.

[Workflow: I fed a black & white sketch of an alien into NightCafe.AI to generate the base of the new sketch, which I then cleaned up and finished in Affinity Photo.]

Hi-rez image link [2160px tall]