How to teleport to the nearest humanoid?

ok so the following script should teleport the player to the back of the nearest other player that is not blocked by a wall or something and deal damage to it. Anyone with basic knowledge of roblox scripting(a.k.a better than ur knowledge on what questions are "legal" to ask in scriptintghelpers(dont worry im bad at this part too apparently)) should be able to reverse engineer this to fit their desires. Sorry i didnt elaborate im lazy but u should be able to grasp it(p.s im not bragging if u find it hard its just that ur not at that level yet(no offense) pls dont criticize me for bringing this up)

place it as a local script in starterpack:

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

wait(1) -- load character

local char = player.Character
local char_root = char:FindFirstChild("HumanoidRootPart")

mouse.Button1Down:connect(function()
	local nearest_hum = math.huge
	
	local target_root
	local target_hum
	
	for i, v in pairs(workspace:GetChildren()) do
		local root = v:FindFirstChild("HumanoidRootPart")
		local hum = v:FindFirstChild("Humanoid")
		
		if root and hum and v ~= char then
			local mag = (char_root.Position - root.Position).magnitude
			
			if mag < 20 and mag < nearest_hum then
				
				local obstructed = false
				
				local ray = Ray.new(char_root.Position, (root.Position - char_root.Position).unit * 20)
				
				local part = workspace:FindPartOnRay(ray, char, false, true)
				
				if part then
					if part.Parent ~= v then
						obstructed = true
					end
				end
				
				if obstructed == false then
					nearest_hum = mag
					target_root = root
					target_hum = hum
				end
			end
		end
	end
	
	if target_root and target_hum then
		nearest_hum = math.huge
		
		local behind = (target_root.CFrame * CFrame.new(0,0,-target_root.Size / 2)).p -- the behind lol
		
		char_root.CFrame = CFrame.new(behind)
		
		target_hum:TakeDamage(10)
	end
end)