Earlier this week SpaceX’s SN10 rocket took off, ascended to ±10km, and then after a free fall in the horizontal position turned vertical again to successfully land (only to explode a few minutes later).
This is a composite image of SN10's launch and landing. I set this camera to shoot one frame a second, threw out any overlapping shots and stacked them all so we can see the trajectory better. @NASASpaceflight
Your drawings probably look rubbish because you’re using an old biro that happened to be laying around. Nobody’s used one of these since cassette tapes stopped needing to be fixed, so throw that in the drawer full of batteries, twine and assorted electrical tape from whence it came.
Instead, go thicker. Go felt tip. Go a marker if that’s all you got. Because if your drawing skills aren’t very good, going thicker is always a good way to hide this fact.