I want to know what subscriptions I have charging my card every month

See this Apple support Billing Article

Subscriptions and Billing - Official Apple Support

You may also be paying for iCloud storage at Settings (your name), iCloud, Manage Storage, (Change Storage Plan)

See (to view as well as cancel): How to cancel a subscription from Apple - Apple Support

This is primarily a user-to-user support forum; other Apple users like you. We don't have access to information about charges to your account. See each of the steps in the following instructions. They include information on contacting Apple Support if the other steps don't help: If you see 'apple.com/bill' or an unfamiliar charge on your statement - Apple Support