If you are a student, you can find specific chapters translated and annotated by modern scholars like Robert Campany or Fabrizio Pregadio.
The Master Who Embraces Simplicity: A Study of the Philosopher Ko Hung, A.D. 283-343 baopuzi english translation pdf best
Ware provides a highly literal, scholarly translation of all 20 Inner Chapters. If you are a student, you can find