192.168.1.1 sits inside the 192.168.0.0/16 private range defined by RFC 1918. It is never routed on the public internet: millions of home networks use the same address at the same time, which is why a lookup shows no location or ISP.
To log in, connect to your Wi-Fi and open http://192.168.1.1. If it times out, your router may use 192.168.0.1, 10.0.0.1 or 192.168.1.254 instead — run ipconfig (Windows) or ip route (Linux/macOS) and look for the default gateway. Default credentials are printed on the router label; change them.
Devices on your LAN get addresses like 192.168.1.2–254 from the router's DHCP server. Your public IP — the one websites see — is different and is shown on the home page.