Assuming you have the right cable and know that your TV and PC support one another's resolution(s), then all you need to do is connect them to one another and power them both on. Make sure that the TV is set to the correct display connector, depending on which one you used to connect it to your PC, and you should see your login screen appear in a few seconds.
If you feel like the resolution isn't quite what you expected it to be, or if it looks blurry, then you may need to manually set the correct one. To do so, follow these steps:
Search for Advanced display info in the Windows search bar, and select the corresponding result.