Where to learn about creating a digital twin of a drone ?

Sorry if it’s the wrong subreddit or if it’s a duplicate I couldn’t find the information on google. I wanted to learn how to create a digital version of a drone to simulate it in a software like airsim. I am cs student and I am completely new to the topic and wanted to create a hobby project of an RL drone that can take off to some height and land by itself. I have experience with RL but no experience with drones or robotics. I wanted to buy a cheap commercial drone and add a graphics card to it. Which would largely impact its weight and shape. That is why I wanted to create a digital copy. Again sorry if it’s the wrong subreddit or if it’s not a detailed question - I first wanted to know whether I can actually have a chance to do this project before thinking about the details. I have a small physics knowledge as well (I only completed physics 1 and physics 2 course at the uni) and don’t know whether aerial engineering knowledge is required for creating a digital copy.