How can I turn off two factor authentication?

Stressful? How so?

Generally, you cannot turn off 2FA. Two-factor authentication for Apple ID - Apple Support

if you’re “stressed” we can certainly assist with explanations as to what might be stressing you.

Can you elaborate?

Ideally, you should feel LESS stress; knowing that your account is VERY secure and there is no longer any need to keep track of the old “security questions”. (ID theft after all is VERY stressfull)