3. Add the amount in cents or pence. So $20 is 2000.
4. Add a company name or product title, description then drop in a product image. Square ratio is best.
5. Change the rest of the options to suit you. The default currency is $ (usd). Use the 3-letter ISO codes
to setup yours.
Change the language of the buttons to your preferred language and select if you'd like to collect a separate billing or shipping address.
"Remember Me" is awesome because it means your customers can checkout next time with 1-click! I'd recommend to leave this on.