What standard should SLR photography meet if it is an entry level?

What is the definition of getting started?

There is probably no absolute standard.

But as you said, you know, there should be no problem taking pictures in daily life. Practice makes perfect, and the rest is experience.

Aperture and depth of field, the larger the aperture (the smaller the aperture value) and the smaller the depth of field, the more virtual the Jiao Wai is.

The larger the aperture, the smaller (faster) the shutter will be when the aperture takes precedence over the shutter (fixed aperture value, shutter automatically matches).

Shutters are divided into B-door and T-door, which are generally T-door. Press the shutter button to open and the button will pop up and close. Door B is opened by pressing the shutter and then closed by pressing the shutter, that is, the shutter time is manually controlled. It is used when taking special photos, such as night scenes, where the light is insufficient and it takes a long time to take photos.

ISO, the higher the ISO, the lower the requirement for ambient light, and the more noise there will be. When the light is sufficient, the ISO is adjusted to the lowest level to obtain the best imaging.