Well, I recommend fun spins on an author's name.
Like, I'm MarkTwain2.0, my friend is at J.K.Scowling (instead of J.K. Rowling).
Maybe Jane Boston, instead of Austen? Leo Stole-Toys, instead of Tolstoy? Hands Christian Anderson?
I have zero good ideas lol

Um idk lol…. Maybe like 🎀 ~ Kawaii-Chan ~ 🎀
or 🩸🖤~ꑾꌥꑾ꒒ꑾꇘꇘ ꒑ꋫꉓꀗ~🖤🩸
i suck at nicnames tho lol