I'm new to Godot and I'm working on my first project in that. The previous game was made on Adobe Flash using AS3. While I coded that, I didn't take the best methods to code the project (used a lot of frames and scripts on the frames instead of using external scripts}). Because of that mistake, I couldn't really code a completely functional loading screen in the end. I don't want the same to happen with my Godot game.
So, what are things I should avoid completely for my loading to work? Also, is setting up a loading screen the last step to game development?
I've seen these instructions to learn how to make a loading screen - https://godotengine.org/qa/41325/how-to-create-a-loading-screen Do you suggest I use the same code for my game? Do I load the loading screen scene the first (making it my main scene)?