There’s no “secret” to being “good” at art other than to practice forever and ever. I used to think there was, when I was in middle school I went out and bought a $70 tablet because an artist I admired said she used a tablet to draw. I wasted my money more than once trying to find a shortcut to being “good” at art.
There’s no shortcut, there’s no pencil or brand of paint or tablet that will make you better. You just have to work at it.