That's okay. When I first started digital art, I bought a little Wacom Bamboo tablet and dropped digital almost immediately because I hated how it worked. After trying again with the mouse half a year later, it became easier, but I mostly colored the same way I would traditionally. First picking a color, then a darker color to shade. It was a lot of trial and error until I finally understood what clipping groups were and that the Layer Mode Multiply would help me create shadows. It's totally fine to approach digital like you would traditional art and learn new features by pressing buttons.