Good day @clairestaff,
Let's look into the recurring transactions feature and why it routes you to the Billing and Subscription page.
This specific feature requires either QuickBooks Online Essentials or Plus. So if you're using Simple Start you'll need to upgrade to at least the Essentials version to be able to use this feature.
Once you've finished upgrading, you can view this article that contains a video along with steps on how you can create recurring transactions: Create a recurring transaction.
I'll be around to provide further assistance, if needed. Don't hesitate to leave your questions or clarifications in the comments below, I'll make sure to get back to you.