Hi ,Congrats, at least you received an update from IRCC , BIL is an essential part of the process and you know your application is one step further toward completion, From now on if the officer is satisfied with your initial eligibility then you will be asked to do the Medical Exam ( which i passed 2 years ago and i am still waiting ) After you hopefully pass the medical exam you are officially admissible and then i guess your case will go under Comprehensive security check , especially if you or your partner is a male applicant. The comprehensive check takes 18 to 24 months at least ( i am at the month 24th and still waiting ). but there is a chance that you wont go under comprehensive screening and they only apply the routine screening which takes 3 months. and if everything is clean you will be granted the eCOPR ( PPR letter ). by the way wish you the best of luck, just practice the act of waiting, it is the only thing you can do.