Custom Character Clothes on player spawning?

Okay, so I already found something similar to this below which gave me a great start, as I'm a newer scripter but the only way to keep me motivated is to work with something that I find is difficult, and I have no clue where to start on this, so basically. I have this.

game.Players.PlayerAdded:connect(function(player)
    local appearanceOverride = game.Players:FindFirstChild(player.Name)
    appearanceOverride.CanLoadCharacterAppearance = false
end)

Now, what I initially planned was to create two teams, SWAT, Criminals, depending on the map and location they'll have different clothes. So, instead of me rambling on about my game, I'll just continue on.

So, my first character I'm working on is going to be a swat person, now that I got it so players appearances won't load, how can I make it so if I made the appearance on a dummy character. Adding the tactical vest model to his torso, and adding textures to his arms, legs, and torso at the same time as his clothing. Along with his helmet. How can I make all of that work for the player when he joins the swat team. Here's a picture of the example (Although no textures are applied right now due to me needing to create em :P)

https://gyazo.com/3f35a055f40acb25c118fc3302268c74

Character models have three things inside them - Shirt, Pants and ShirtGraphic (T-Shirts). These are only if the player is wearing one of these items. So:

local shirtId = 00000
local pantsId = 00000

game.Players.PlayerAdded:connect(function(p)
	p.CharacterAdded:connect(function(char)
		if char.Shirt then
			char.Shirt.ShirtTemplate = "http://www.roblox.com/asset/?id=" ..shirtId -- has to be an image file, remove 1 from the id to get the image. if it's not the shirt, take away 1 again
		else
			local shirt = Instance.new("Shirt",char) -- makes new shirt if the player isn't wearing one
			shirt.ShirtTemplate = "http://www.roblox.com/asset/?id=" ..shirtId
		end
		if char.Pants then
			char.Pants.PantsTemplate = "http://www.roblox.com/asset/?id=" ..pantsId
		else
			local pants = Instance.new("Pants",char)
			pants.PantsTemplate = "http://www.roblox.com/asset/?id=" ..pantsId
		end
	end)
end)

game.Players.PlayerAdded:connect(function(player) -- Hat adder
    repeat wait()until player.Character
    local hatId = 000000 -- Find the ID of the hat
    local hat = game:service("InsertService"):LoadAsset(hatId):GetChildren()[1]
    hat.Parent = player.Character
end)

game.Workspace.ChildAdded:connect(function(plr) --Pants and body adder
 	local name = plr.Name
 	local playerinplayers = game.Players:FindFirstChild(plr.Name)
	 playerinplayers.CanLoadCharacterAppearance = false
	 plr.Head.face.Texture = "rbxassetid://000000" --Find an ID of a decal for your face.
	 local shirt = Instance.new("Shirt", plr)
	 shirt.ShirtTemplate = "rbxassetid://000000" -- Find the ID of the shirt
 	local pants = Instance.new("Pants", plr)
 	pants.PantsTemplate = "rbxassetid://000000" -- Find the ID of the pants
end)