how do i turn my find my iphone off from here

The easiest way is to do it through you iCloud account. Log in from any web browser to https://www.icloud.com/find/

Here is an additional support article with more information: https://support.apple.com/en-us/HT201441

You can also remove the device from your account which turns off Find My Phone and the Activation Lock.

Find My Phone – Remove device.