Could you help me get my weapon to block with q button?

I am trying to make a sword for my game that will allow my character to block left when the q button is pressed but still play a animation to swing the sword. I haven't been scripting for long so it would be nice if you could point out all errors I have. This is the code I currently am working with. If you need any other scripts that I am working with to understand the problem I will gladly show you them. Thank you, -Peanut

local function WaitForChild(parent, childName)
    while not parent:FindFirstChild(childName) do parent.ChildAdded:wait() end
    return parent[childName]
end

local Tool = script.Parent

local Animations = {}
local MyHumanoid
local MyCharacter


local function PlayAnimation(animationName)
    if Animations[animationName] then
        Animations[animationName]:Play()
    end
end

local function StopAnimation(animationName)
    if Animations[animationName] then
        Animations[animationName]:Stop()
    end
end

function OnEquipped(mouse)
    MyCharacter = Tool.Parent
    MyHumanoid = WaitForChild(MyCharacter, 'Humanoid')
    if MyHumanoid then
        Animations['EquipAnim'] = MyHumanoid:LoadAnimation(WaitForChild(Tool, 'EquipAnim5'))
        Animations['IdleAnim'] = MyHumanoid:LoadAnimation(WaitForChild(Tool, 'IdleAnim3'))
        Animations['OverheadAnim'] = MyHumanoid:LoadAnimation(WaitForChild(Tool, 'OverheadAnim2'))
        Animations['SlashAnim'] = MyHumanoid:LoadAnimation(WaitForChild(Tool, 'SlashAnim2'))
        Animations['ThrustAnim'] = MyHumanoid:LoadAnimation(WaitForChild(Tool, 'ThrustAnim2'))
        Animations['UnequipAnim'] = MyHumanoid:LoadAnimation(WaitForChild(Tool, 'UnequipAnim2'))
        Animations['Blockleft'] = MyHumanoid:LoadAnimation(WaitForChild(Tool, 'Blockleft'))
    end
    PlayAnimation('EquipAnim')
    PlayAnimation('IdleAnim')
end

function Blockleft(key)
    PlayAnimation('Blockleft')
end


function OnUnequipped()
    for animName, _ in pairs(Animations) do
        StopAnimation(animName)
    end
end


        mouse.Keydown:connect(function(key))

            if key == "q" then
                Tool.Equipped:connect('BlockLeft')

    end

Tool.Equipped:connect(OnEquipped)
Tool.Unequipped:connect(OnUnequipped)

WaitForChild(Tool, 'PlaySlash').Changed:connect(
    function (value)
            PlayAnimation('SlashAnim')
    end)

WaitForChild(Tool, 'PlayThrust').Changed:connect(
    function (value)
            PlayAnimation('ThrustAnim')
    end)

WaitForChild(Tool, 'PlayOverhead').Changed:connect(
    function (value)
            PlayAnimation('OverheadAnim')
    end)