https://mattepaint.com/academy/tutorial/camera-matching-with-fspy/

Whenever you need to model something in a scene, you will need to know the camera parameters such as focal length, position, rotation, etc. Often in a VFX pipeline we will be provided with this information, however for personal work you'll need to do it yourself. fSpy is a great tool to find this information and start modelling, it's relatively simple to get started, so let's take a look!