Need help with auto turret i made to test out raycasting, how should i fix this?

So i wanted to make something and I have also followed a tutorial however it is not working and everything i do to it wont fix it and another thing is the while wait() do loop is only playing once and i am also not getting any errors in output.

local turret = script.Parent

local bulletdamage = 15
local bulletspeed = 150
local aggrodist = 75
local firerate = .3
local bullet = game.ReplicatedStorage:WaitForChild("Bullet")

while wait(firerate) do
	print("Checking")
	local target = nil
	for i,v in pairs(game.Workspace:GetChildren()) do
		local human = v:WaitForChild("Humanoid")
		local root = v:WaitForChild("HumanoidRootPart")
		if human and root and human.Health > 0 then
			if (root.Position - turret.Position).magnitude < aggrodist then
				target = root
			end
		end
	end
	
if target then
		local root = target
		turret.CFrame = CFrame.new(turret.Position, root.Position)
		local NewBullet = bullet:Clone()
		NewBullet.Parent = workspace
		NewBullet.Position = turret.Position
		
		NewBullet.Velocity = turret.CFrame.LookVector * bulletspeed
		
		NewBullet.Touched:Connect(function(hit)
			local hum = hit.Parent:WaitForChild("Humanoid")
			if hum then
				hum:TakeDamage(bulletdamage)
				NewBullet:Destroy()
			elseif hit ~= turret then
				NewBullet:Destroy()
			end
		end)
	end
end

Just realised that instead of doing 'WaitForChild' i could do 'FindFirstChild', so it wont have to wait for it and instead it will just search for it while also allowing it to run other things in workspace to search for.

so the problem with this is that the for loop will run through everything in the workspace. but the right after it

local human = v:WaitForChild("Humanoid")

is waiting for a instance called Humanoid but v could be some random part in the workspace. for this example v = Camera. but there is no instance called Humanoid under camera. so the loop would just stop here until a Humanoid instance pops up. to fix this you can make it so that if there is no humanoid under the instance then continue the loop and go to the next instance. i cant think of a better way someone else may but this is how i would do it.

local turret = script.Parent

local bulletdamage = 15
local bulletspeed = 150
local aggrodist = 75
local firerate = .3
local bullet = game.ReplicatedStorage:WaitForChild("Bullet")
local findhumanoid = function(part)
	for i, v in pairs(part:GetChildren()) do
		if v.Name == "Humanoid" then
			return(v)
		else
			return(v)
		end
	end
end
local HumanoidRootPart = function(part)
	for i, v in pairs(part:GetChildren()) do
		if v.Name == "HumanoidRootPart" then
			return(true)
		else
			return(false)
		end
	end
end
while wait(firerate) do
	local target = nil
for i,v in pairs(game.Workspace:GetChildren()) do
	local found1 = findhumanoid(v)
		if found1.Name == "Humanoid" then
			local human = found1
		local found2 = HumanoidRootPart(v)
			if found2.Name == "HumanoidRootPart" then
				root = found2
				if human and root and human.Health > 0 then
					if (root.Position - turret.Position).magnitude < aggrodist then
						target = root
					end
				end
		end
	end
end

if target then
	local root = target
	turret.CFrame = CFrame.new(turret.Position, root.Position)
	local NewBullet = bullet:Clone()
	NewBullet.Parent = workspace
	NewBullet.Position = turret.Position

	NewBullet.Velocity = turret.CFrame.LookVector * bulletspeed

	NewBullet.Touched:Connect(function(hit)
		local hum = hit.Parent:WaitForChild("Humanoid")
		if hum then
			hum:TakeDamage(bulletdamage)
			NewBullet:Destroy()
		elseif hit ~= turret then
			NewBullet:Destroy()
		end
	end)
end
end

if you have any problems comment on this response