I didn’t even really talk to anyone about it when I bought mine!
I walked into 711, asked for a speakout card and $20 of minutes.
She explained the card is non-refundable, they’re not responsible if it doesn’t work in a non-speakout phone, stuff like that.
It all happens online at their website BTW. Just create an account and go.
The receipt for the minutes is huge because it has your instructions and passcode on it, don’t loose this!!
The sim card has an instruction sheet inside on how to activate. You need the IMEI number of your phone, it’s printed on the big chip on the bottom (assuming the sim card side I’m calling the top). KEEP THIS NUMBER PRIVATE! No pictures online, stuff like that. AFAIK this may be the only time it’s actually used.
Once your sim is activated, then you follow the procedure to add minutes to that account. This is the “usual” procedure for this kind of pay-as-you-go.
Sorry if I’ve over-explained, this was actually my first pay-as-you-go and with this “strange” phone I wasn’t sure how it would all work. It seemed like black magic, but was awesome. 
That being said, if I could have afforded another regular cellphone line, I’d have just walked into fido and added one, gotten a nano-sim and been done. I’m 99% sure that would work OK too.