How can i set my camera height and width correctly?

So i want my first person camera to be like in the other games like rust etc. My camera is like this, ive been looking for solution for long time and tried doing anything and cant find it. This is my main issue atm
this is my first person cam and there you can see my hands and torch little bit.
this is my character from other perspective.
i want it to look like this with other hand with it