little Applescript - if it can be done

I'd like someone to write me a little Applescript. I'd like to change all my macOS Calendar email alerts to alerting a different email address. I'd pay $20. As I look at the dictionary for Calendar in the Script Editor, I see you can change "url". Not sure if that will work. But if I change the email on my card in Contacts, new events will use that address. So maybe you could read, delete, and recreate the events.