I tried many ways, and the best way for me seems that pretend your finger is a pen, and use that as a base or something. Or if you're better with a mouse, get a mouse. Or if you could get one, but a tablet.
Drawing tablets are like a pad that you can draw on, and then they show up on your laptop. Android doest own any drawing tablets (not that I know of). Are you talking about a regular tablet with apps and stuff?