@Aditya_Kulkarni
Hello, below is a setup video for your reference to install your wireless router:
How to Set up TP-Link Wireless Router
But if you still failed, please refer to the troubleshooting suggestions below to check your settings:
What should I do if I cannot access the internet through Wi-Fi router?
If the internet still doesn't work, please provide more details as follows:
1. Who is your ISP, and if the internet works when you connect a computer directly to the ISP cable? If not, you will need to confirm with your ISP how this internet works and how we need to configure it with a router, whether it requires a special setting, etc.
2. Have you tried all the suggestions listed above? What are the results?