You will know if its an email from Apple if it says Dear and your first name right after. If this seems to be a real email from Apple, you've done all you need to do which is delete the email if you don't need it.
Identifying legitimate emails from the iTunes Store - Apple Support
If it is fake, it will say something like "Dear Customer" "Dear Client"
Identify and report phishing emails and other suspicious messages - Apple Support
If you suspect it is fake, forward the email as an attachment to reportphishing@apple.com
Hope this helps you out and have a good afternoon 🙂