Whenever I import something, it doesn't show up. I have tried it with different objects but it still won't work.
As you can see in the picture, it looks like something is selected but you can't see it.
Blender Stack Exchange is a question and answer site for people who use Blender to create 3D graphics, animations, or games. It only takes a minute to sign up.Sign up to join this community
If your object has been imported without errors, you should be able to see it in the outliner:
If it's there, select it in the outliner (left click on its name).
You will be able to check its size in the "Number" panel at the right of the 3D viewport: if it's not showing, press N to open it. Look under "Transform">"Dimensions":
dimensions too small (smaller than 0.01) or too big (larger than 100) can be tricky to visualize. Scale your object up or down by using S and then moving the mouse until the dimensions are around 1.
You can also hit . to center your object into view.
If your object has dimensions of zero, there were probably some issues with the file format and/or the 3D information hasn't been imported properly. If that's the case, you should provide more information about the file format and the tools you are using to import it.