Help Need With Woocomerce Invoicing Problem

Hi, I have an website made with Wordpress and Woocomerce. I am selling digital goods.

Digital items which can be renewed. The problem is as Woocomerce do not send auto renewal notice, My customers cannot renew their service.

What is the best solution for this? How can I send automatic renewal notice of the service with invoice for payment?

I have manual payment settings with BTC. I ma using a plugin. I do not use any other payment gateway. So there is no option for me to setup PayPal subscription or something like that.

I just want to set something that sends my customer renewal notice with payment link.

I find a guideline from the woocommerce
I hope this would works
https://woocommerce.com/document/subscriptions/renewal-process/