Hello,
The Full node adapter is for connecting full node wallets to the plugin. To connect the plugin to WooCommerce, you will need to also install the WooCommerce Cryptocurrency Payment Gateway extension. Installation instructions for the payment gateway are available at the link above, under “installation instructions”.
(App extensions such as the payment gateway are available to paying members. Membership plans are listed here.)
If your coin is new and is not yet listed on major exchanges, then the plugin will not know what the exchange rate to fiat is, so you will not see your coin as an option on checkout. (See also troubleshooting section for the gateway under the title “If you cannot checkout a cart:”.
If you are pricing your WooCommerce products in any other currency than your own cryptocurrency, you will need to provide the exchange rate yourself. To do this, download the following file, adapt it to your needs as per the comments, and install and activate it as a new plugin. You can either specify a fixed exchange rate, or use PHP curl to pull the exchange rate from some external API.
https://gist.github.com/alex-georgiou/492196184f206002c864225180ca8fbb
Please let me know if you have any further questions on how to do this.
with regards