How can I add a sound when I open my door in roblox?

All you would do is insert a sound into SoundService, reference that sound, then out Sound:Play() after the door opens. Example:

local sound = game.SoundService.DoorOpening --Make sure it is named DoorOpening if you are using this.

--DOOR OPENING SCRIPT--
sound:Play()

It would've helped a lot more if you gave the script.

You could make a sound in the part and make a script that plays it when opened. You would put this script in the handle if its a click detector :

local sound = script.Parent.Parent.Sound
script.Parent.MouseClick:Connect(function()

sound:Play()

end)

Put the script as a normal script.