bodygyro and bodyvelocity not working?

Hello!

I have been trying for the past couple of days to make a working spaceship using bodygyro and bodyvelocity.

Goal: To make a working spaceship using bodyvelocity and bodygyro.

Problem: It doesn't fly and it gives me an error message. (Workspace.WH_HAN.LocalScript:8: attempt to index nil with 'Position')

Current scripts: (local script Inside the player character)

local ship = workspace.Spaceship
local player = game.Players.LocalPlayer
local gyro = ship.BodyGyro -- these body movers are to be placed in the main part inside the model
local bodyvelocity = ship.BodyVelocity
local ship_model = workspace.Spaceship

local function flyShip()
    gyro.CFrame = CFrame.new(ship_model.PrimaryPart.Position, player:GetMouse().Hit.p)
    local Direction = ship:GetPrimaryPartCFrame().lookVector
    bodyvelocity.Velocity = Direction * 65 -- can be any value for speed
end
game:GetService("RunService").RenderStepped:Connect(flyShip)

I also did set the player's network ownership (I think at least) (Script is inside the seat for the spaceship)

local VehicleSeat = script.Parent

VehicleSeat.Changed:Connect(function(prop)
    if prop == "Occupant" then
        local humanoid = VehicleSeat.Occupant
        if humanoid then
            local player = game:GetService("Players"):GetPlayerFromCharacter(humanoid.Parent)
            if player then
                VehicleSeat:SetNetworkOwner(player)
            end
        else
            VehicleSeat:SetNetworkOwnershipAuto()
        end
    end
end)

I'm sorta new to scripting and I wouldn't be surprised if I had to redo my entire code. If anyone can help me out, Thanks in advance!