"Create a script that makes you first person and make's you walk in a realistic way"

-- local script 
local player = game.Players.LocalPlayer
local camera = workspace.CurrentCamera
local humanoid = player.Character.Humanoid

camera.CameraType = Enum.CameraType.Scriptable
camera.CFrame = CFrame.new(humanoid.RootPart.Position)

local walkSpeed = 8
local jumpPower = 50
local isJumping = false

humanoid.WalkSpeed = walkSpeed
humanoid.JumpPower = jumpPower

local function animate()
    local moveVector = Vector3.new()
    local moveDirection = camera.CFrame.lookVector

if InputService:IsKeyDown(Enum.KeyCode.W) then
        moveVector = moveVector + moveDirection
    end
    if InputService:IsKeyDown(Enum.KeyCode.A) then
        moveVector = moveVector - camera.CFrame.rightVector
    end
    if InputService:IsKeyDown(Enum.KeyCode.S) then
        moveVector = moveVector - moveDirection
    end
    if InputService:IsKeyDown(Enum.KeyCode.D) then
        moveVector = moveVector + camera.CFrame.rightVector
    end

if moveVector.magnitude > 0 then
        humanoid:Move(moveVector * walkSpeed)
    end

if InputService:IsKeyDown(Enum.KeyCode.Space) and not isJumping then
        isJumping = true
        humanoid:ChangeState(Enum.HumanoidStateType.Jumping)
        wait(0.1)
        humanoid.Jump = true
        wait(0.5)
        isJumping = false
    end
end

game:GetService("RunService").RenderStepped:Connect(animate)