Simply choose Afterpay as your payment method at checkout. First-time customers will have to provide payment details. Any returning customers can simply log in to make their purchase. Your first payment will be taken when you place your order.
At any time, you can log in to your Afterpay account to see your payment schedule and make a payment before the due date. Otherwise, Afterpay will automatically deduct the instalments from your debit or credit card every fortnight.
If you have any further enquiries regarding Afterpay, you can check out their FAQs for more information here.