How to set the parameters of SLR? Shooting is holding a backhand.

There are a few questions you need to clarify first.

1 The brightness of the picture is not only determined by the aperture, you should pay attention to the combination of shutter and aperture.

If you give priority to the aperture, it is equivalent to giving the task of photometry to the machine completely, but it is impossible for the machine to measure your ideal state, so you must constantly adjust the exposure compensation yourself, or use spot measurement or directly use M block!

3 Blurred background. Don't forget the distance between the subject and the background object. If properly controlled, driving to F 1 1 can also blur the background. If your composition makes the background far enough away from the subject,

There are also some basic knowledge of ISO and output formats that you should understand.

You can use a flash, a reflector, etc. In the early days, you can also try HDR later.