Problem with the remote event. Any solutions?

Hello. I was trying to build and code a gun. Here's the code.

Local script

local player = game:GetService("Players").LocalPlayer
local mouse = player:GetMouse()
local shoot = game:GetService("ReplicatedStorage"):WaitForChild("Sparo")
local tool = script.Parent
local hole = script.Parent:WaitForChild("Buco")

tool.Equipped:connect(function()
	mouse.Button1Down:connect(function()
		local ray = Ray.new(hole.CFrame.p, (mouse.Hit.p - hole.CFrame.p)* 500)
		local hit, position = workspace:FindPartOnRay(ray, player.Character)
		if hit then
	    local humanoid = hit.Parent:FindFirstChild("Humanoid")
		shoot:FireServer(hit, humanoid)
		end
	end)
end)

Server script

local shoot = game:GetService("ReplicatedStorage"):WaitForChild("Shoot")
local damage = game.StarterPack.Tool.Configuration.Danno.Value

shoot.OnServerEvent:Connect(function(hit, humanoid)
		if hit.Name == "Head" then
		print("Headshot")
		humanoid:TakeDamage(damage * 2) 
		else
		print("Hit")
		humanoid:TakeDamage(damage)
		end
end)

The output

Hit
12:03:46.469 - TakeDamage is not a valid member of Part

I can't get it to detect headshots and deal damage.

I tryied to run all the code on a local script and it worked fine. But when I try to use remote events the arguments start working in a weird way. I'm still learning and I would appreciate an explanation of the arguments. Any solution to this?

Thanks in advance.