How to Fix This Path Finding Script To Follow The Nearest Player?

I want to make it so that this NPC follows the nearest player. But the script doesn't work. It's supposed to follow the nearest player but instead it follows the first player to join. How would I fix this? Please help.

Thank you!

(Path finding script)

debugMode = false
targetNPCs = false

    h = script.Parent.Parent:WaitForChild("Humanoid")
    pathService = game:GetService("PathfindingService")
    targetV = script.Parent:WaitForChild("Target")

    function closestTargetAndPath()
        local humanoids = {}
        if targetNPCs then
            local function recurse(o)
                for _,obj in pairs(o:GetChildren()) do
                    if obj:IsA("Model") then
                        if obj:findFirstChild("Humanoid") and obj:findFirstChild("Torso") and obj.Humanoid ~= h and obj.Humanoid.Health > 0 and not obj:findFirstChild("ForceField") then
                            table.insert(humanoids,obj.Humanoid)
                        end
                    end
                    recurse(obj)
                end
            end
            recurse(workspace)
        else
            for _,v in pairs(game.Players:GetPlayers()) do
                if v.Character and v.Character:findFirstChild("HumanoidRootPart") and v.Character:findFirstChild("Humanoid") and v.Character.Humanoid.Health > 0 and not v:findFirstChild("ForceField") then
                    table.insert(humanoids,v.Character.Humanoid)
                end
            end
        end
        local closest,path,dist
        for _,humanoid in pairs(humanoids) do
            local myPath = pathService:ComputeRawPathAsync(h.Torso.Position,humanoid.Torso.Position,500)
            if myPath.Status ~= Enum.PathStatus.FailFinishNotEmpty then
                -- Now that we have a successful path, we need to figure out how far we need to actually travel to reach this point.
                local myDist = 0
                local previous = h.Torso.Position
                for _,point in pairs(myPath:GetPointCoordinates()) do
                    myDist = myDist + (point-previous).magnitude
                    previous = point
                end
                if not dist or myDist < dist then -- if true, this is the closest path so far.
                    closest = humanoid
                    path = myPath
                    dist = myDist
                end
            end
        end
        return closest,path
    end

    function goToPos(loc)
        h:MoveTo(loc)
        local distance = (loc-h.Torso.Position).magnitude
        local start = tick()
        while distance > 4 do
            if tick()-start > distance/h.WalkSpeed then -- Something may have gone wrong. Just break.
                break
            end
            distance = (loc-h.Torso.Position).magnitude
            wait()
        end
    end

    while wait() do
        local target,path = closestTargetAndPath()
        local didBreak = false
        local targetStart
        if target and h.Torso then
            targetV.Value = target
            targetStart = target.Torso.Position
            roaming = false
            local previous = h.Torso.Position
            local points = path:GetPointCoordinates()
            local s = #points > 1 and 2 or 1
            for i = s,#points do
                local point = points[i]
                if didBreak then 
                    break
                end
                if target and target.Torso and target.Health > 0 then
                    if (target.Torso.Position-targetStart).magnitude < 1.5 then
                        local pos = previous:lerp(point,.5)
                        local moveDir = ((pos - h.Torso.Position).unit * 2)
                        goToPos(previous:lerp(point,.5))
                        previous = point
                    end
                else
                    didBreak = true
                    break
                end
            end
        else
            targetV.Value = nil
        end
        if not didBreak and targetStart then
                goToPos(targetStart)
        end
    end
end