How do I make the Third Person Camera and my Character face towards the crosshair?

I am making a Battle Royale game and I do not know how to script the camera like what it does in Island Royale.

place in StarterPack; i will explain everything below

local rs = game:GetService("RunService")
local uip = game:GetService("UserInputService")

local plr = game.Players.LocalPlayer
local mouse = plr:GetMouse()

local cam = workspace.CurrentCamera

local angX = 0
local angY = 0
local camPos = Vector3.new(3.5, 0, 7.5)

wait(.1)

cam.CameraType = Enum.CameraType.Scriptable
uip.MouseBehavior = Enum.MouseBehavior.LockCenter

uip.InputChanged:Connect(function(input)
	if input.UserInputType == Enum.UserInputType.MouseMovement then
		angX = angX - input.Delta.X * .4
		angY = math.clamp(angY - input.Delta.Y * .4, -80, 80)
	end
end)

rs.RenderStepped:Connect(function()
	local char = plr.Character
	local root = char:FindFirstChild("HumanoidRootPart")
	
	local waist = char:FindFirstChild("Waist", true)
	local neck = char:FindFirstChild("Neck", true)
	
	if char and root then
		local dir = (root.CFrame:Inverse() * cam.CFrame).LookVector
		root.CFrame = root.CFrame * CFrame.Angles(0, -math.asin(dir.X), 0)
		
		waist.C1 = CFrame.new(waist.C1.p) * CFrame.Angles(-math.asin(dir.Y) / 2, math.asin(dir.X) / 2, 0)
		neck.C1 = CFrame.new(neck.C1.p) * CFrame.Angles(-math.asin(dir.Y) / 2, math.asin(dir.X) / 2, 0)
		
		local startCFrame = CFrame.new((root.Position + Vector3.new(0, 2, 0))) * CFrame.Angles(0, math.rad(angX), 0) * CFrame.Angles(math.rad(angY), 0, 0)
		
		local camCFrame = startCFrame + startCFrame:vectorToWorldSpace(Vector3.new(camPos.X, camPos.Y, camPos.Z))
		local camFocus = startCFrame + startCFrame:vectorToWorldSpace(Vector3.new(camPos.X, camPos.Y, -99999))
		
		cam.CFrame = CFrame.new(camCFrame.p, camFocus.p)
	end
end)

so what dis does in essence is lock the mouse at the center, constantly offset the camera's position while making the player turn on the X axis to face the mouse and I added some dynamics to the character's stale body.