Förbereder mig is both prepare and prepare myself? How would you specify yourself if the context required it - eg. I did not have enough time to prepare myself for the interview rather than I did not have time to prepare (generally) for the unexpected guests.
I am a non-native speaker of English. English for me is a foreign language. When I do not express myself in grammatically correct English, it doesn't mean my understanding of Swedish is per se incorrect. Have mercy. This course is about Swedish, not about English!