?Still a little confused about running these functions

I recently asked a questions about why my functions in the script of my tool wouldn't run on button press. The person who answered my first question told me to run my functions individually and my functions wont even run on Activated() I'm not sure if there's an error in my variables, or my code. Here is the entire code from what I have so far.

tool = script.Parent
player = tool.Parent
handle = tool.Handle
blastsound = handle.Blast
blast = Instance.new("Part")
blast.Name = "ElectricBall"
blast.BrickColor = BrickColor.new("Cyan")
blast.Material = "Neon"
blast.FormFactor = "Custom"
blast.Size = Vector3.new(4, 4, 4)
blast.TopSurface = "Smooth"
blast.BottomSurface = "Smooth"
blast.Locked = true
blast.CanCollide = false
blastsound:Clone().Parent = blast
blast.Blast.Volume = 1
Lift = Instance.new("BodyForce")
Lift.force = Vector3.new(0, blast:GetMass() *196.25, 0)
Lift.Parent = blast
game.Lighting.Lightning:Clone().Parent = blast
Enabled = false
Damaging = false

function poweron()
    if Enabled == false then
        game.Lighting.Aura:Clone().Parent = player.Torso
        player.Humanoid.WalkSpeed = 25
        local light = Instance.new("PointLight")
        light.Parent = player.Torso
        light.Brightness = 15
        light.Color = Color3.new(0, 255, 255)
        light.Range = 8
        Enabled = true
        end
end

function poweroff()
    if Enabled == true then
        player.Torso.light:Destroy()
        player.Torso.Aura:Destroy()
        player.Humanoid.WalkSpeed = 16
    end
end

function shoot()
    if Enabled == true then
        local d = player.Torso
        local newblast = blast:Clone()
        newblast.CFrame = tool.Parent.Torso.CFrame + (handle.Position - tool.Parent.Torso.Position).Unit * (handle.Position - tool.Parent.Torso.Position).Magnitude
            newblast.Velocity = (d.CFrame.lookVector * 180) + Vector3.new(math.random(-20, 20), 0, math.random(-20, 20))
            newblast.Touched:connect(BlastHit)
            newblast.Parent = game:GetService("Workspace")
            newblast.Blast:Play()

    end
end

function BlastHit(Part)
    if Part ~= nil and Part.Parent ~= nil and Part.Parent:FindFirstChild("Humanoid") ~= nil and Part.Parent ~= tool.Parent then
        Part.Parent.Humanoid:TakeDamage(40)
        Part.Parent.Humanoid.Jump = true
        wait(0.1)
        if tool.Parent:FindFirstChild("Torso") ~= nil then
            Part.Velocity = Part.Velocity + (tool.Parent.Torso.Position - Part.Position).Unit * 150
            tool.Parent.Torso.Velocity = (Part.Position - tool.Parent.Torso.Position).Unit * 200
        else
            Part.Velocity = Part.Velocity - Part.CFrame.lookVector * 120
        end
    end

How would I go about running the functions on button press while the tool is equipped?