Cloning model into player glitching out, any help to fix it?

Hello.

So I have this starship I made and I want to clone it into the player when they join, and weld it to them, so they are in the starship.

I have this code:

local Players = game:GetService("Players")

Players.PlayerAdded:Connect(function(player)
    wait(5)
    print(player.Name .. " joined the game!")
    char = player.Character

    shipClone = script.Parent:Clone()
    shipClone.Parent = char

    shipClone.Anchored = true

    shipClone.Position = char:WaitForChild("HumanoidRootPart").Position
    char:WaitForChild("HumanoidRootPart").Position = shipClone.Seat.Position

    shipClone.WeldToPlayer.Part0 = char:WaitForChild("LowerTorso")
    shipClone.WeldToPlayer.Part1 = shipClone
end)

For some reason, whenever it happens the player is teleported to a new location, with only the parent part, everything else way off in the distance, and I am stuck in the air.

The error is probably very obvious, so sorry, I only got a couple hours of sleep last night. If you can figure out why it is doing this, please tell me.

Oh, and I am new to scripting, so there's that.

Props to you if you can help me out,

-ProqrammedGreen