I'm not a teacher, but I have seen sentences where 'so' was followed by a verb.
We were so looking forward to meeting your family.
I think I might say something like "I'm so enjoying your party that I can't help telling you about it", but let's wait for a native speaker's comment.
PS. I doubt it's okay to say 'I'm enjoying'. "Enjoy' is a transitive verb.
Student or Learner