Hello giammarco,
What you are looking to do is create an ‘Actor Blueprint’ and add your characters mesh. Then you will add a ‘Camera Component’ as well as a ‘Spring Arm’ component to control the cameras distance from the character.
The documentation on creating a camera is great, and will hopefully answer any questions you have upon setting this up for your project!
Using Cameras
Let me know if you found this helpful, or if you need further assistance.
Cheers,