It's good to learn to relax.
Once upon a time, I would have recoiled at the thought of posting a drawing like this- where the bottom of the horn is crammed out to the very lower edge of the paper. Or perhaps I would have Photoshopped a bunch of digital paper down there, to center the drawing more.
But now, whatever.
It's just a sketch in the sketchbook. It's as big as it is.