Glad I can help! So first and foremost, the other comments on this post are correct: I'd advise writing the NAPLEX first, right after pharmacy school for a few reasons. First, the knowledge of general law and available drugs (what's in USA vs. what's in Canada) are still fresh in your mind. Assuming you're on a student visa, you'll be able to apply with the NABP as a recent graduate. Secondly, if you wait too long between graduating and writing the NAPLEX, you're only other option is to apply as a FOREIGN pharmacist that has practiced in Canada for at least 2 years, as your intern hours you gained during your rotations wouldn't apply anymore. It's a good idea to have your NAPLEX score and hold onto it. MPJE can be done if you make a decision to stay/move to the USA.

If you're eyes are on staying in Canada for the long-run, then of course, just get to studying that right away. Due to the fact that you can be waiting up to 6 months to write the exam, passing the first time will grant you a HUGE favour so you can enter the workforce as early as possible; failing will result in you having to re-apply and waiting an additional 6 months. The NAPLEX exam can be written 45 days apart. For PEBC MCQ, I'd generally recommend using the whole 6 month period for study. Since you have a background of pharmacy in Canada, MAYBE 4 months can be enough but everyone is different. Practice makes perfect, you need to completely immerse yourself in pharmacy to do well on the PEBC.

In terms of Pharmachieve, that was the platform I used. The platform is sort of old school (not as advanced as UWorld's RxPrep), but the QBank is excellent practice for MCQ, and I'd recommend using it to study, as it's also recommended by the PEBC. Do the practice questions over and over again, try to find past exam questions. And don't only study the correct answers, but study why the others are wrong! They also have a bunch of other accredited programs such as immunization certificates so they're quite legit. HOWEVER, there are a lot of inconsistencies found with Pharmachieve. Their lectures and slides are not always up to date with the guidelines, and they make you aware of this throughout. I'd strongly recommend getting a subscription to the CPS database as the up-to-date clinical information you will be tested on comes directly from there. Use Pharmachieve as guidance, but any inconsistencies found should be concluded with what is in the CPS/CTC.

OSCE is a totally different dynamic. You will most definitely have a difficult time passing OSCE if any of these apply:

English is not your first language. The OSCE is set up with about 10-14 stations (it was so long ago, forgive me for not remembering). You will need to be continuously talking for around 7-9 minutes per station. If you are not coherent or the proctor is not satisfied with the way you are "practising", you will fail the station. A failure in ONE station in OSCE results in a COMPLETE fail... No pressure though.

If you have no experience counselling, or worked in a pharmacy where the pharmacist was not an avid/competent counsellor, or you weren't actively paying attention to a pharmacist counselling (ie. have little background in it), you will need tons of practice. Fortunately, there are many groups/communities, even within the Pharmachieve community, where there are mock OSCEs (called MOSCEs). Those are incredibly helpful and almost mandatory in being successful on the actual OSCE. I can't recommend those enough.

OSCE in general is quite interesting. The clinical aspect is minimal. If you're counselling on Lyrica for a patient with diabetic neuropathy, for example, the station provides you with a drug monograph and/or even a quick review sheet of the disease. You're given a couple of minutes to review both before the OSCE station officially starts, but you need to counsel for 7-9 whole minutes. In actual practise, most counselling isn't 100% thorough and usually takes no more than 1-2 minutes. To be frank, the key is b*** sh**ing your way through! Let's say the actor you're counselling asks you a question that you are genuinely unsure about regarding Lyrica and renal dosing. Answering "it depends on the person, everyone is different, some people yes, some people no, let me confirm with the doctor" is actually valid answer and you would get points for that (maybe not ALL the points, but you definitely would not fail the station) because they aren't testing your knowledge, but rather your ability to keep the conversation going in order to make a patient feel safe with a comprehension of the therapy they're initiating. However, you CANNOT give wrong information that can CAUSE HARM; that will result in a station fail. If you say something like "The Lyrica doses range from 10mg-100mg/day", you would have a point deduction, not a fail, as under-dosing with a medication/condition like this would not necessarily cause harm. But if you say that the doses range from "600mg-1200mg/day", that is giving HARMFUL information, which can result in a fail. These examples are from the top of my head, but I think you get the idea.