I made a new test. To put the car at that specific clutch point at which it makes the noise while the park brake was still on, and I discovered the car only makes the noise if it moves. I tried all pedal positions and no matter what, unless the car started moving a little bit, the car was silent. Basically, what I thought was a specific clutch point, was just the point at which the car starts moving.

Can you guys help me interpret this? If it was clutch related, wouldn't the car still make the noise while not moving? Because the gear is engaged, the car is making the force to move, it's just not moving because the handbrake is on!
Right now I'm thinking this is most likely a movement related thing and not necessarily clutch. Because basically the car seems to make the noise exactly when it starts moving very slowly and stops making it as soon as it picks up speed. But then again, I'm pretty sure it only happens if reverse is engaged, meaning if I just let the car drop a bit backwards, it wont happens. If it was brake related it probably would, right?