I am completely new to designing games in general and everything associated to them except for some rudimentary coding. I have, as my first game, a player moving around and I’m working on getting them to shoot. What do I do?! Where do I go to make my own textures and music? What should I start with from here?
For textures you can use Gimp to make them, for music there are sites that provide it for free. For 3d models you can look for pre-made ones or make human characters with autodesk character generator and animate it with mixamo. If you are a blender user there is also makehuman that helps to make human models that you can retouch in blender. When you have specific coding questions this is the right place where to ask 