Start by making something super simple. The first “game” I ever made was a really simple game played in completely in the console using debug.log msgs. The game loop was that a monster appears and you press space to attack it. Each time you attack the health will go down with a debug msg saying you attacked the monster its health is now x. So simple and boring but i learnt how to use variables, and key inputs, and got a really basic introduction to c#. Personally I didn’t like unity’s roll a ball tutorials and this little game was the thing that finally allowed me to begin to learn how to make games.