I am trying to use the Find My App to find my phone. I found it but not with the help of Find My. I've used the app before without any problem but today not so much.

When I click on Find My on my mac this is what I see: 1st view on Find My

I clicked on devices and nothing showed up. It also said I had to sign in. I couldn't find anywhere to sign in so I clicked on the "system preferences" link and got this page into which I was signed in: Prefs.

I don't know where to go from here. I do know I want the sound choice to locate my phone. Thanks.

Your second screen shot shows that you are NOT signed in to iCloud. See the left sidebar of the second image where iCloud is greyed out and it says "not signed in". The Find My app requires that you be signed in to iCloud and then check the Find My app in the list of iCloud options (which show up after you have signed in).

That's what I thought, but I looked up "does Find My App need iCloud?" and found an article that said use iCloud or Find My, so I thought I had a choice. I don't use iCloud. Let me try that. The second screen shot says I am signed in, but maybe not into iCloud. There is a sign out link, so I thought I was signed in. So confusing.

Update:
Signed into iCloud and went from there, and it worked. Thanks, Ira.