You’ll likely need to add some hooks to connect your WooCommerce subscriptions to Discourse groups. There are some topics with examples. If sticking code in a functions.php file isn’t in your wheelhouse you can post in #marketplace with a budget.
I’ve not seen anyone do WooCommerce subscriptions. Look in wordpress - Discourse Meta and you’ll find examples for things like MemberMouse and Paid memberships pro. It sounds like you should be able to find examples that will give you enough to go on.
The plugin’s README explains what it’s doing. Instead of installing the wp-discourse-woocommerce-support plugin, you can copy the code from the README’s ‘Alternatives to installing the plugin’ section into your theme’s functions.php file.