Some options here: PayPal Simple for most accounts 1, 2 & 3 students.
The paid member subscriptions function will be updated to monthly recurring payments in May 2019, right now it only offers single payments, I will be in touch with you individually about it and keep you updated. For that reason, I have created a “free” option for right now. That way you can subscribe through paypal and still register for your own account within the site. 🙂 More great functionality to come! Musically, Adam M