Bisq is not like a normal exchange. You dont send CAD to Bisq, you send directly to your trading peer as part of the trading process.
“Unfortunately” you need some Bitcoin first to use Bisq, this is how the software can enforce trading in a trustless way with the use of bitcoin multisig technology.
Once you have your bitcoin from your peer, you can get litecoin from shapeshift.io
Here are some videos that may help.
and a faq https://bisq.network/faq/