Video calling is becoming more and more prominent and you don't need to spend a lot of money to make some improvements.
You need to have a good setup so consider your camera, sound, and lighting.
For the camera, don't use a built-in webcam but your phone instead or an external webcam.
In terms of sound, use a USB microphone or clip-on mic.
When it comes to lighting, use a well-lit room and face a window if possible. You can also use LED lights.
These are all great and easy tips!