Maybe it’s right in from of my face but I’m not seeing it.
The dark bar across the top of the page (has the menu, thread title, and your username initial in a circle) has a magnifying glass icon. That is the search function. Click on it, and you can do a search or an advanced search.
This thread in the technical help section has lots of good information on how to do various things here:
There are instructions there on how to search, with nice screen shots to help you.
Oh thanks everyone!!! Super helpful! As is suspected it was right in front of my face.