Where should I go as a solo female traveler?

Yes, hi, hello. I really would love to travel somehow by myself, as I just graduated and feel like now is the time to go somewhere that can help me gain a new perspective. Here are some places I've thought of. Would love to hear from some fellow travelers!
  1. Europe
    Just like an overall backpacking trip
  2. Australia/New Zealand
  3. Japan
  4. Southeast Asia
    Really wanna go to Japan, but I've read that with the money to Japan I could go to Southeast Asia for a while instead
  5. Where else should I consider or should I pick one of these?