I installed Find My Phone and then it locked and I have noway to get back in. When I swipe up to put in my pin it just clicks and yells what's on the screen. Please understand I am furious. I thought I was doing something safe for my phone and right

Your problem is Talkback, nothing else.

Look here: https://support.google.com/accessibility/android/answer/14252950?hl=en#:~:text=Press%20and%20hold%20both%20volume,tap%20to%20turn%20off%20TalkBack.

Otherwise: You need to tap everything twice (1st to read it, 2nd to use it), you need to go through that until you reach your device settings and disable talk back (i really recommend it to disable it if you don't need it always when installing a new phone because i had so many repairs when i was working in a certified repair center just because of this app).

The last option: Wipe and reinstall it using the recovery menu (talk back will be tunred off then as well).

But in general: The issue is not coming from find my phone!