How to achieve realistic first person view

I want to achieve

I have tried this script in starter character scripts which should work but doesn’t:


local InputService=game:GetService("UserInputService")
local Camera=game.Workspace.CurrentCamera
local Player=game.Players.LocalPlayer
local Character=Player.Character
local Head=Character.Head
local Torso=Character.Torso
local RootPart=Character.HumanoidRootPart
local RootJoint=RootPart.RootJoint
local Neck=Torso.Neck
Camera.FieldOfView=90
Camera.CameraType="Scriptable"
InputService.MouseBehavior=Enum.MouseBehavior.LockCenter



local v3=Vector3.new
local cf=CFrame.new
local components=cf().components
local inverse=cf().inverse
local fromAxisAngle=CFrame.fromAxisAngle
local atan,atan2=math.atan,math.atan2
local acos=math.acos

local function toAxisAngleFromVector(v)
	local z=v.z
	return z*z<0.99999 and v3(v.y,-v.x,0).unit*acos(-z) or v3()
end

local function AxisAngleLookOrientation(c,v,t)--CFrame,Vector,Tween
	local c=c-c.p
	local rv=(inverse(c)*v).unit
	local rz=rv.z
	return rz*rz<0.99999 and c*fromAxisAngle(v3(rv.y,-rv.x,0),acos(-rz)*(t or 1)) or c
end

local function AxisAngleLookNew(v,t)--CFrame,Vector,Tween
	local rv=v.unit
	local rz=rv.z
	return rz*rz<0.99999 and fromAxisAngle(v3(rv.y,-rv.x,0),acos(-rz)*(t or 1)) or cf()
end

local function AxisAngleLook(c,v,t)--CFrame,Vector,Tween
	local rv=(inverse(c)*v).unit
	local rz=rv.z
	return rz*rz<0.99999 and c*fromAxisAngle(v3(rv.y,-rv.x,0),acos(-rz)*(t or 1)) or c
end




local Sensitivity=0.005


local CameraDirection=Vector3.new(0,0,1)

local function EulerAnglesYX(l)
	local x,z=l.x,l.z
	return atan(l.y/(x*x+z*z)^0.5),-atan2(x,-z)
end

local function AnglesXY(l)
	local z=l.z
	return atan2(l.y,-z),-atan2(l.x,-z)
end

local function MouseMoved(Input)
	if Input.UserInputType==Enum.UserInputType.MouseMovement then
		local dx,dy=Input.Delta.x*Sensitivity,Input.Delta.y*Sensitivity
		local m2=dx*dx+dy*dy
		if m2>0 then
			CameraDirection=(AxisAngleLookOrientation(RootPart.CFrame,CameraDirection)*fromAxisAngle(v3(-dy,-dx,0),m2^0.5)).lookVector
		end
		local RootOrientation=RootPart.CFrame-RootPart.Position
		local RelativeDirection=RootOrientation:inverse()*CameraDirection
		local AngX,AngY=AnglesXY(RelativeDirection)--RootOrientation:inverse()*
		if AngX<-1.57*11/12 then
			local y,z,c,s=RelativeDirection.y,RelativeDirection.z,math.cos(-1.57*11/12-AngX),-math.sin(-1.57*11/12-AngX)
			z,y=z*c-y*s,z*s+y*c
			CameraDirection=RootOrientation*v3(RelativeDirection.x<0 and -(1-y*y-z*z)^0.5 or (1-y*y-z*z)^0.5,y,z)
		elseif AngX>1.57*11/12 then
			local y,z,c,s=RelativeDirection.y,RelativeDirection.z,math.cos(1.57*11/12-AngX),-math.sin(1.57*11/12-AngX)
			z,y=z*c-y*s,z*s+y*c
			CameraDirection=RootOrientation*v3(RelativeDirection.x<0 and -(1-y*y-z*z)^0.5 or (1-y*y-z*z)^0.5,y,z)
		end
	end
end

local Mouse=Player:GetMouse()

local Zoom=-0.5

Mouse.KeyDown:connect(function(k) 
	if k=="e" then 	
		Zoom=-0.5
	elseif k=="q" then
		Zoom=8
	end
end)

InputService.InputChanged:connect(MouseMoved)

Neck.C1=cf()

local _
local DirectionBound=3.14159/3
local CurrentAngY=0

local function CameraUpdate()
	Camera.CameraType="Scriptable"
	local cx,cz=CameraDirection.x,CameraDirection.z
	local rvx,rvz=RootPart.Velocity.x,RootPart.Velocity.z
	if rvx*rvx+rvz*rvz>4 and cx*rvx+cz*rvz<-0.5*(cx*cx+cz*cz)^0.5*(rvx*rvx+rvz*rvz)^0.5 then
		DirectionBound=math.min(DirectionBound*0.9,math.abs(CurrentAngY*0.9))
	else
		DirectionBound=DirectionBound*0.1+3.14159/3*0.9
	end
	local AngX,AngY=EulerAnglesYX((RootPart.CFrame-RootPart.Position):inverse()*CameraDirection)
	if AngY>DirectionBound then
		RootPart.CFrame=RootPart.CFrame*CFrame.Angles(0,AngY-DirectionBound,0)
	elseif AngY<-DirectionBound then
		RootPart.CFrame=RootPart.CFrame*CFrame.Angles(0,AngY+DirectionBound,0)
	end
	_,CurrentAngY=EulerAnglesYX((RootPart.CFrame-RootPart.Position):inverse()*CameraDirection)
	local CameraOrientation=AxisAngleLookNew((RootPart.CFrame-RootPart.Position):inverse()*CameraDirection,1)
	Neck.C0=CFrame.new(0,1,0)*CameraOrientation*CFrame.new(0,0.5,0)
	local PreCam=AxisAngleLook(RootPart.CFrame*cf(0,1,0),RootPart.CFrame*v3(0,1,0)+CameraDirection)*CFrame.new(0,0.825,0)
	if Zoom==8 then
		local Part,Position=Workspace:findPartOnRay(Ray.new(PreCam.p,PreCam.lookVector*-8),Character)
		Camera.CoordinateFrame=PreCam*CFrame.new(0,0,(Position-PreCam.p).magnitude)
	else
		Camera.CoordinateFrame=PreCam*CFrame.new(0,0,Zoom)
	end
end

game:GetService("RunService").RenderStepped:connect(CameraUpdate)

I have tried changing the camera to what the script says:![Screenshot 2021-03-05 090641|690x241](upload://pPiXoi2lT5Z3ypfbKrplG9QqjrA.png) ```
What am I missing?

I’ll be honest, that image makes no sense to me. What are you trying to do?

What is the script you posted supposed to do? Did you write it? What are the important parts?

Also please post code surrounded by backticks
```
like this
```
so it shows up

like this

I’m trying to make a first person where everything is visible except your head. The script is suppose to make you go to first person mode and do that.

I fixed this, sorry if I wasted your time.