I need help learning how to do monthly billing via credit card

Welcome to the Community, @cusa4ever.

Yes, I can help you subscribe to QuickBooks Online using a credit card.

You can follow the steps below on how to update or add your credit card your monthly subscription. Here's how:

1. Log in to your account and go to the Gear icon (⚙), then select Account and Settings.
2. From the left menu, select Billing Subscription.
3. Select Edit ✎ beside your payment method.
4. Add your credit card info.
5. Make sure the address in QuickBooks is the same as the one on your credit card statement.
6. Click on Confirm card or Save.

Check this article for more information: Update the payment information for your subscription. 

Also, you can check these links to know which QuickBooks Online version fits your business: 

• Compare QuickBooks Online Plans.
• Pricing and subscription levels for QuickBooks Online.

I'm always here if you need more help with your subscription. Take care and have a wonderful day!