how do I make the script wait for the character to load?

I'm making a magic fighting game but my spells will load before the character does in online mode and then not work... and I've gotten help but it didn't help the issue

heres the script :

local Player = game:GetService'Players'.LocalPlayer
local character = Player:WaitForChild("Character")
local Mouse = Player:GetMouse()
local head = character:WaitForChild'Head'
local torso = character:WaitForChild'Torso'
local rightShoulder = Torso:WaitForChild'Right Shoulder'
Run = game:getService("RunService")




Mouse.KeyDown:connect(function(key)
    if script.Wait.Value == false then
if key == "f" then
    script.Wait.Value = true
    for i = 1, 2 do
            for i = 1, 12 do
                RightShoulder.C0 = RightShoulder.C0 *CFrame.Angles(0, 0, 0.16)
                RightShoulder.C0 = RightShoulder.C0 *CFrame.Angles(0, 0, 0)
                Run.Stepped:wait(0.01)
            end
            for i = 1, 12 do
                RightShoulder.C0 = RightShoulder.C0 *CFrame.Angles(0, 0, 0)
                RightShoulder.C0 = RightShoulder.C0 *CFrame.Angles(0, 0, -0.16)
                Run.Stepped:wait(0.005)
            end
        end
            for i = 1, 12 do
                RightShoulder.C0 = RightShoulder.C0 *CFrame.Angles(0, 0, 0)
                RightShoulder.C0 = RightShoulder.C0 *CFrame.Angles(0, 0, 0)
                Run.Stepped:wait(0.005)
            end
game:getService("Chat"):Chat(Player.Character.Head, "FireBall!")
local p = Instance.new("Part", Workspace)
p.Color = Color3.new(0, 0, 0)
p.Transparency = 0.5
p.Size = Vector3.new(3, 3, 3)
p.TopSurface = "Smooth"
p.BottomSurface = "Smooth"
p.CanCollide = false
p.Shape = "Ball"
s = script.FD:Clone()
s.Parent = p
s.Disabled = false
p.CFrame = Player.Character.Torso.CFrame*CFrame.new(0, 0, -12)
y = Instance.new("BodyVelocity", p)
y.maxForce = Vector3.new(math.huge, math.huge, math.huge)
y.velocity = Player.Character.Torso.CFrame.lookVector*80
local f = Instance.new("Fire", p)
wait(6)
game.Debris:addItem(p, 1)
script.Wait.Value = false
else print'waiting'
end
end
end)