Selling DIY electronics online
I can't help with Canadian regulations, but I would caution on selling internationally to EU counties (as you mentioned a web shop).

Selling practically all electronic products in/to the EU requires CE marking, and attestation of compliance with certain regulations is required in that. You can self-declare without expensive lab testing, but as you're asking here you wouldn't be competent to do so. 

The most important thing to bear in mind, and this may very well be true in Canada too, is that a sub-assembly being compliant is essentially irrelevant. The regulations only care about the complete product and your particular use of compliant components can easily render the whole non-compliant.