WooCommerce Authorize.net SUBCRIPTION plugin

We use Authorize.net for the merchant acct; THEY recconmended we use "Authorize.net, a Visa Solution" (a different Authorize.net plugin) for our subscription service so we've already installed that but I need help setting it up. https://woo.com/document/authorize-net/?utm_medium=email&utm_source=order%20confirmation&utm_campaign=Triggered%20-%20order%20confirmation