Welcome Susie!
It's true, there's a lot to absorb here. When you take it in small pieces at a time, it's actually quite manageable, BUT: you don't even have to!
There's no TFP rule that insists that you have to do all your homework and reading before asking for help. This is a very active site with a lot of helpful members. If you find the reading and videos overwhelming, just come back and ask questions. You WILL get answers.
If there is a rule, it's that we need you to arm yourself with a recommended test kit. In nearly all cases, the investment of a kit more than pays for itself. The biggest challenge will be getting a kit in Canada, and because of that challenge we'll be patient.
Please stick around and ask questions in the meantime - you'll be surprised how simple it really is.