The only ball that is in your court is the fact that you aren't the first person in this situation and others have fought the good fight and worked out some of the kinks for you (yay!)
For the first two years every applicant got "non-comparable", even those educated in the US obtaining 4 year BSNs from universities that 3 months before applying to NNAS were accepted by Canadian nursing bodies. It was a @% show and there is zero real oversight or accountability. NNAS is a scam and a for-profit business--they know the result of applicants' Advisory Report prior to them applying (no way a nurse who was educated in Nigeria for example will get "comparable"). NNAS consists of American non-nurses evaluating how well your nursing education compares to that of a current Canadian nursing grad.
You are likely to get "somewhat comparable". Almost nobody gets "comparable". Most in your situation got non-comparable and then had to do a $500 exam called IENCAP (I"m talking about Ontario here, it has a different name in Alberta but is the same exam and costs around $1500). Since so many people fought back, they have added a step where before requiring you to do this exam they will ask you to have paperwork sent in to the nursing body that you applied to detailing your nursing work experience. This experience that you have is likely what will save you, if anything does.
So basically NNAS will send you an Advisory Report. This has taken up to 10 months for some people. From there you request they send your file to the nursing body. As soon as you apply they will invite you to take a Jurisprudence exam. Many get excited thinking this means something but it doesn't. They ask everyone who applies, even if they know there is no way they will be getting their license anytime soon.
This exam can be done at any point after this during the process. Then nursing body sends you a letter telling you what is next (in your case likely the info about work experience). Once that is sent in they will tell you whether it is enough to consider you to have met the education requirement. If yes, they will say you can sign up to take NCLEX-RN (not sure what you meant about how hard it is---of course it's hard, its the licensing exam for countries that uphold the highest standards in nursing care). After you have met all requirements including passing NCLEX-RN it takes 8-10 weeks to have a license in hand.
If they decide work experience isn't enough and you have to take IENCAP, this is a different story. In that case I don't think you'll have a nursing license by Aug 2019.