HUD and Godmode help

[MGPazda]

Hi, I'm making a build to kill gamemode and there's a few things I can't figure out.

First, I don't know how to change part of the HUD when a variable changes. I have this:

function hud()
local health = LocalPlayer():Health()
draw.RoundedBox(0, 505, ScrH() - 15 - 35, 200, 40, Color(0,255,0,255))
draw.RoundedBox(0, 535, ScrH() - 15 - 5, 170, 8, Color(255,0,0,255))
draw.SimpleText(LocalPlayer().btghudText, "default", 535, ScrH() - 15 - 30, Color(255,255,255,255))
end 
hook.Add("HUDPaint", "MyHudName", hud)

and var btghudText is changed in init.lua on respawns and when they take out a certain weapon.

However, all that's coming up is nil as the text. How do I change it when the variable changes, to the string on the variable? Also, how would I do this with the colors?

My next problem is, I want people to have god mode when they spawn, but have it taken away when they take out said weapon. They get god when they spawn, but when they tak eout the weapon they still have it. Here's my script for when they take out the weapon:

hook.Add("PlayerSwitchWeapon", "Grabbin.Peelz", function(ply, oldWeapon, newWeapon)
 
        local btknewWep = newWeapon:GetClass()
		ply:PrintMessage(3, "Picked Uap: "..newWeapon:GetClass()) 
        if btknewWep == "fas2_ak47" then
        ply.btkProtected = false
    ply.btkBgcolor = 505
    ply.btkhudText = "Building protection: OFF"
    ply:GodDisable()
        
    if ply:Team() == 1 then
        ply:SetColor( Color( 250, 255, 0, 185 ) );
    elseif ply:Team() == 2 then
        ply:SetColor( Color(0, 0, 255, 185 ) );
    else
        ply:SetColor( Color(255, 0, 0, 185 ) );
    end
        
        end
 
		
end)

Am I doing something wrong?

Thanks!