How would I script this so whenever I punch it will damage the player?

I have a punch script in a local script and server script. I use local script to detect when he punches, create a cool down and play an animation. The server is used to damage the punched player.

How would I make it work? Im really new to combat systems and damaging the humanoid.. please help me..

Local script:

local AnimPunch = Instance.new("Animation", Character)
AnimPunch.AnimationId = "rbxassetid://3673137593"
local PunchAnim = Humanoid:LoadAnimation(AnimPunch)

Pressed = false

UIS.InputBegan:Connect(function(k)
	if k.KeyCode == Enum.KeyCode.F and Pressed == false then
		Pressed = true
		PunchAnim:Play()
		punchEvent:FireServer()
		wait(0.3)
		Pressed = false
	end
end)

Server script:

function punch_plr(p)
	local char = p.CharacterAdded:Wait()

	local hit = char.RightArm --I tried finding whenever a player touches my hand it will damage him (this is the punching hand)
	
	local hum = hit.Parent:FindFirstChild("Humanoid")
	if hum then
		hum:TakeDamage(2)
	end	
	
end

punchEvent.OnServerEvent:Connect(function(p)
	punch_plr(p)
end)