how can I make a raycast go from the handle to the position using the characters root?

So I want to make this Raycasting script where the player shoots out a beam from the handle to the position of unit * 300 using the lookvector of the players root. I’m not quite sure how i can do this because the raycasting math is a little bit confusing. Can I get any help?

Script

local ray = Ray.new(root.CFrame.p, (char:FindFirstChild(“HumanoidRootPart”).CFrame.LookVector*10 - root.CFrame.p).unit * 300)
local part, position = workspace:FindPartOnRay(ray, char, false, true)
local beam = Instance.new(“Part”, workspace)
beam.BrickColor = BrickColor.new(“Bright red”)
beam.FormFactor = “Custom”
beam.Material = “Neon”
beam.Transparency = 0.25
beam.Anchored = true
beam.Locked = true
beam.CanCollide = false
local distance = (Tool.Handle.CFrame.p - position).magnitude
beam.Size = Vector3.new(0.3, 0.3, distance)
beam.CFrame = CFrame.new(Tool.Handle.CFrame.p, position) * CFrame.new(0, 0, -distance /2)
game:GetService(“Debris”):AddItem(beam, 0.1)