how do i turn OFF two factor authentication on i phone 11???

you can't turn it off unless you are within 2 weeks of when you enrolled

Two-factor authentication for Apple ID - Apple Support

roseyf wrote:

Not very computer savvy at this point

That’s OK.

It means you should read and pay attention to the early parts of the article above. They will tell you the many security benefits you will gain by using two-factor authentication.

This cannot be done.

See the next to last question here.

Two-factor authentication for Apple ID - Apple Support