Hey,
PR Travel document(PRTD) can only be applied outside of Canada.
Couple of things you should know about PRTD:
1. Only issued for a one time entry (not multiple unless some exception)
2. Time to issue differs for different countries. Make sure you call the related office and get an estimated time and make sure your trip is longer than that time. Indian VFS for example takes 7-10 days.
3. It's kind of a hassle, so if you can delay your trip or get someone to FedEx the card once it arrives, would be better. And yes Fedex is safe.
Regards,
Zee