Well, since your name is currently Sophsparks, I have a few ideas, all of which are jokes, of course.
I found 2 ways to make your name into a joke, the first is if your interpret the name as Soph-Sparks, in which you could change your name to be a joke of the elements or progression of what comes from a spark, such as:
Sophdrop
Sophire (Soph+Fire)
Sophandthesligthwindgoingwest
The other way is to interpret your name as Soph's parks or Sophs parks, in which your name could be changed to something stupid having to do with parks, like:
Sophsinreverse
SophsNationalForest
SophsTheOnlyOneWhoCanStopWildfires
SouphPark (lol)
SophsBadParking