How to take pictures with Sony camera?

That depends on what kind of camera you are. There are many models of Sony cameras, some can take pictures and some can't. In particular, most professional cameras can't take pictures, and most of them use home functions to take pictures. If the camera can take pictures, there is a button to switch between shooting and taking pictures. Even if not, you can switch through the on-screen menu. Some cameras have shutter buttons, and some need to click on the screen.

This is the toggle button. I wonder if you have this button. If not, go to the touch screen and switch to the camera icon to take pictures.