You repeatedly keep on stumbling over the same basic problems because you haven’t learned the fundamentals of Godot’s scene system and scripting. Without that it’ll be very hard to move forward in any serious capacity.
Asking over and over for help with the same thing can only get you so far, before the patience of people trying to mentor you wears out. You can’t realistically expect the forum to make your game for you. Time to learn those basics and how to solve node/scene navigation problems yourself.
Going through “my first game” tutorials in the docs may help you with that.