Wireless Key Requires 64 Hex Characters

macOS and Mac Apps

Hi All,

I have a question. Keep in mind I don't use Mac often.
I am running a Mac Book Air. I'm pretty sure it's a 2016 model.
OK. So, I am feeling very dumb right now. Here is the problem:
I am trying to connect to a wireless network, but I can't seem to do it successfully. I go to System Preferences -> Network and connect to the network. I get a standard password field to enter my key, but I noticed something weird. It is asking me for a 64 character hexadecimal key. And I tried entering my normal key, but the Join button continues to be dimmed no matter what I do.
Now, just to clarify, I know about hexadecimal and all that stuff. I am a programmer for goodness sake and have my CS degree. But I feel I shouldn't have to enter a long string of text to access a wireless network! I thought the mac was supposed to be more user friendly? :)
Sorry for that mini rant.
Anyway, you guys have any idea as to what I should do? Is there an easier way to join a Wireless network?
I know there is something obvious I'm probably missing.
Oh, and I'm running High Sierra, which I am trying to get upgraded.

Thanks for any help.