I was wondering how you would unplug the stock horn on a 2000 Honda Civic Ex. I want to replace it with a lower/louder horn than the stock one, any suggestions?

You unplug it?
then cut the connector and crimp on like a blade terminal to connect it to the aftermarket horn

I couldn't figure out how to unplug it and didn't want to accidentally rip it. Is there a pin or something to pinch in somewhere before pulling off?

The little lock tab is on the back, you can kind of see it in the second photo, unbolt it if you want better access

Would I be able to have two horns? I've been looking at these ones here: Or would I have to get a single horn similar to the OEM one? I've also been looking at horns from RockAuto, and they have ones just like the OEM ones that I would just buy.

If you had issues with removing the bolt in the picture... I would say stay with one horn, unless the dual horn is single wire input