In order to accept payments on your WooCommerce website and offer payment plans, you need to set up a payment gateway. You can do this through the following:

1. Select a payment gateway from the list of supported gateways. For example, Stripe.
2. Download and install the plugin for the gateway.
3. Set up the gateway in the WordPress dashboard through Payments.

Here are some video tutorials of how to set up payment gateways on WooCommerce: