If you give a ****, I have some advice:
Use pencils to sketch a rough drawing of your characters and scene so you can easily erase mistakes or bad proportions and plan out how your comic’s panel will look. Draw basic shapes that comprise your character. For example, this sketch (not mine) has circles for the upper and lower head with the pencil lightly pressed down on the paper. You can keep drawing the circle until it’s just the right shape. Train your hand to flow across the paper in quick motions through repetition, like drawing lines in different directions and curves or 3D shapes.
After the rough sketch, you can refine the linework with pencil, like a second linework layer. Don’t be afraid if it doesn’t look right just yet, you can always erase and try again.
When all the pencil lines are done, you can do the final linework on top with a pen. Make sure the pencil marks are fairly light so you don’t need to press too hard to erase them and smudge the ink.
Also try to visualize, if you can, what the most appealing angle would be for your comic panel. You could have the droid viewed from the side facing the left, which portrays him seeing something off-panel, but it looks a little simple. Try experimenting with 3D perspectives when you feel confident enough to take that on.
Finally, I suggest getting a scanner if you can. I have one of these: www.123inkcartridges.ca/p-354906-canon-lide220-… Even if the scanned drawing is a little too bright or saturated or whatever, you can quickly adjust the brightness levels and whatnot in Photoshop or Gimp.
Use pencils for sketches before final linework, start with basic shapes that make up your character, train your hand with drawing shapes and lines, repetition is your friend, and experiment.