"create a roblox script that i can put in a r6 morph that welds custom models to my body and makes me invisible and then tell me where to put everything"

-- This is a local script that should be placed in StarterPlayer > StarterCharacterScripts. It will make your character invisible and weld a custom model to it.

local player = game.Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local humanoid = character:WaitForChild("Humanoid")
local model = game.ServerStorage:WaitForChild("YourModel") -- replace "YourModel" with the name of your model

humanoid.DisplayDistanceType = Enum.HumanoidDisplayDistanceType.None -- makes your character invisible

local function weldModel()
    local clone = model:Clone()
    clone.Parent = character
    for _, part in ipairs(clone:GetChildren()) do
        if part:IsA("BasePart") then
            local weld = Instance.new("WeldConstraint")
            weld.Parent = part
            weld.Part0 = part
            weld.Part1 = character:FindFirstChild(part.Name)
        end
    end
end

weldModel()

-- You should place your custom model in ServerStorage and rename it to "YourModel". This script should be placed in StarterPlayer > StarterCharacterScripts. The script will make your character invisible and weld the custom model to it. Make sure the custom model's parts have the same names as the character's parts they should be welded to.