Need advice for easiest way to set up payments for monthly recurrent charges for SAAS product.

I currently have a SAAS business that bills using invoices through QuickBooks. It’s time-intensive for sales and onboarding. I created a new product that is more automated, allowing clients to purchase without interaction with sales team. This is new for me - so coming here for crowdsource advice. What is the easier platform to create a payment page for purchase of product ($500) and monthly recurrent auto payments ($15/mo)?

I already have domains and I’m familiar with Wordpress. It could be plugins to my existing site with Stripe or creating a Shopify page or… something else?

Looking for easy options to create an MVP within a few hours since I already have customers ready to pay and test it out.

Thanks!