Activating my apple account

You can't. If you are being told there isn't enough information to reset them, contact Apple ID Support.

If you don't know the answers, if the steps in the article below don’t work, contact Apple ID Support, although based on multiple posts I have read, they will not help you recover the answers to your security questions.

 Apple ID - If you forgot the answers to your Apple ID security questions.      *

From the article below. 

Without proof of your identity via security questions and other carefully selected criteria, Apple Support can't help you reset a password or perform any other actions on your account. These policies are audited and reviewed on a regular basis.

Security and your Apple ID.    *

Apple ID - Official Apple Support.    -

Contact Apple for help with Apple ID account security - Apple Support.  * (Link doesn't always load)  

Get Support   - Work through the screens to get a chat option. 

Apple Support schedule phone call. -

https://twitter.com/AppleSupport.  -

See if anything here helps. 

Solution to the forgotten Apple ID security questions.  -

"If you forgot the answers to your Apple ID security questions" click here --> https://support.apple.com/HT201485

If you see the message "not sufficient information" see if at this stage you can still sign up for Two Factor Authentication:

Two-factor authentication for Apple ID --> https://support.apple.com/HT204915

If you cannot resolve the issue by signing up for Two Factor Authentication, "Contact Apple for help with Apple ID account security"; click here --> https://support.apple.com/HT204169