The quickest (and easiest) way to check that your VPN working is with your IP address. Make a note of your original IP address before you connect to a VPN server and compare it to the IP address you see after you've connected—using a site like ip.me. If they're different, your VPN is working as it should and masking your IP address. If they're the same, you may need to reinstall your VPN or contact customer support.