Brand new to gamemaker: How long does it typically take to get a grasp of what you are doing?

I have always wanted to try to make a game but have zero experience in just about everything that goes into making a game the only thing I have experience in is writing stories thats it lol- I heard gamemaker was pretty beginner friendly so I am trying it out. Im also on a very bad laptop so the 2d nature of it should be able to run better on this laptop. So I started watching one of the tutorials and lets just say im way out of my league im very confused. I also understand that I probably should be confused because im not going to understand everything that goes into making a game with just one tutorial. So I have a couple of questions

Do you really need a some sort of background in coding to start to understand this. Because even the guy in the video is moving through everything pretty quick and I feel like they assume you will have some knowledge in coding already, btw people who self learn this stuff mad impressive. If so what are some resources to learning what each thing in the code does and how to apply it to your situation

Also how long would you think it would take for someone who is brand new to make their own thing? I feel like the rpg tutorial while nice because it shows you some stuff I feel like its not super in depth on what each thing and action does and how you can make your own thing. The main video is just showing you how to make that copy of that simple rpg, I get that they are giving the basics but like I said Im below the basics