My computer doesn't even see the wifi hotspot as an available network to check these settings.
@mynewhomeCan your phone's wifi connect to anything else eg another hotspot?
If your computer cannot see your phone, can anything else in your household eg tablet see your phone as a wifi hotpot (let alone connect)?
At this stage, it is not an APN problem (since you can use the phone as a BT hotspot). The problem is with your phone's wifi configuration.
Since you mentioned previously your phone is previously with Fido, is it a Fido phone? Another option is to flash the phone to a firmware without provider customizations. If you aren't confident in doing that, most neighbourhood cellphone repair place can do it at very reasonable cost.
@mynewhomeDepending on what devices you have.. download one of the many network diagnostic devices from the relevant app store. You should be able to get more details. It could be as simple as needed to put in a proper DNS entry.
I still recommend you to get a carrier free Android on the phone (you should be able to get Android 8), as it eliminates a lot of the hidden gotchas. Fido needs to unlock the phone when requested, but they are not obligated to remove any carrier customization done to the phone's OS.