how can I reset my security answers without contacting apple support

You can't. If there was a method of bypassing them without having Apple verify your identity in some other way, they wouldn't be security questions.

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Forgotten Security Questions

1. If you forgot the answers to your Apple ID security questions - Apple Support
2. Apple ID- All about Apple ID security questions
3. Contact Apple for help with Apple ID account security - Apple Support
4. Security questions

For Problems With Your Apple

1. Forgot iCloud Password
2. Forgot Apple ID
3. Apple ID - Apple Support
4. Manage your Apple ID primary, rescue, alternate, and notification email addresses - Apple Support
5. About your Apple ID email addresses - Apple Support
6. Get help with Apple ID

Go to AppleID.com and sign in. From there you can reset your security questions by answering your security questions (which you don't know) or you can click on "Forgot your answers?" and reset by your rescue email. If you don't have access to your rescue email or at least two security questions, you'll have to call Apple.

Have you tried using 2-factor auffentication? Here’s how it works: 2-factor auffentication for Apple Id - Apple Support