One of the motorcycle forums has changed the levels from newbie, jr, full, etc to more topical, playful labels.
I don't recall all of them but they are along the lines of Moped, Scooter, Streetbike, and Iron Butt.
We (you) could do something similar, guitar-related.
And they don't even have to make a whole ton of sense, as nobody here probably cares much about 'rank' on an internet forum.

They could just be fun.
I'm sure you could get suggestions on potential labels; picker, strummer, shredder, axeman, etc.....

-K