>>42827891-3 pixel with no sensitivity is the best way to get to the heart of your ability to control your hand movement. And it also translates well to pen and paper, which is also the best way to get better when it comes to trad. Once you master this, you can add line weight with said 1px brush or transition into learning how to use prrssure sensitivity (or with the case of trad, a brush pen) much more efficiently, since you already have the advantage of a much higher level of control with your pen when compared to the average artist.