To install Cashfree on your Magento Store you need to follow the below steps.
You'll need to purchase the Cashfree plugin for Magento2 from here. You do not have to pay anything to purchase the plugin.
Once you have purchased the plugin, you need to install it to your Magento Store.
Visit System > Web Setup Wizard > Extension Manager to install the plugin. The Screenshots show the installation process in detail.
Once the installation is complete, you will need to enable Cahsfree and enter your appId and secretKey in the credentials. See Configuration Screenshots
To accept international payments, you can link your PayPal account to your Cashfree account from the dashboard. PayPal will be displayed as a payment option on your checkout page.