YabType : and a word, :fire, or emoji and ⇥. Yab finds emoji by name, by keyword and by meaning, so exhausted finds 😴. Your pinned and frequently used ones come first.
Copy it, or type it into the box you were in↩
Copy it⌘↩
Copy its code, U+1F525⇧⌘C
Pin it⇧⌘P
Take it off Frequently Used⌃X