Hi ogarciaramos,
Thanks for using Apple Support Communities. We understand you are not getting clear picture when using the built in camera for FaceTime. We want to make sure your new Mac is working as expected, and we're happy to help.
First, check to see if there is anything on the camera that may prevent it from focusing. Wipe the camera lens with a soft, dry, cloth. If you have a case, or any type of cover, on the computer, please remove and test. You can see more about cleaning your Mac here: How to clean your Apple products
Next, make sure you've upgraded to the latest software version of macOS: How to update the software on your Mac
Try the camera in multiple apps - in addition to FaceTime, you can try iMovie or Photo Booth, for example. Do you get the same results? We look forward to hearing back from you.
Thanks.