Try to learn on the coding aspect about scriptable objects, state machines, inheritance, procedural animation, coroutines and shaders. Also try to learn blender and practice drawing to make nice visuals for your game. One of the MOST IMPORTANT things that you can learn in game development is working organized!!! A lot of projects never see the light of day because developers lose track of the project. Make a base prototype first and a solid gameplay loop and when everything works start polishing. It helps a lot working with Trello. Good luck on your game dev Journey!