You should expect to wait a couple months. As your status indicates, the next step is for your background check to begin. When your background check begins to process, your MyCIC will read: "We are processing your background check. We will send you a message if we need more information."
Since you are with Ottawa VO, don't expect an AOR2. You'll know your PR application is in process when you go into ECAS and it says "We started processing your application on..." The wait from here until the next step may seem miserable, since the beginning steps go so quickly, but just hang in there, Ottawa is one of the fastest VOs!