how do I change my rescue email address?

Your Apple ID

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

Forgot 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

how do i change my rescue email? and I can't remember my security questions

You can't if you don't know your answers, you will have to contact Support in your country to get the questions reset : If you forgot the answers to your Apple ID security questions - Apple Support