Your sketchbook doesn’t need an audience. Private practice is still practice.

Work that nobody sees still counts. The hours in a sketchbook, the songs recorded on a phone and never sent, the writing in a notebook: all of it builds the same hand and the same eye as the work you show. Treating the private pages as not real is how people end up only ever making things for posting, which is a much narrower way to get better.

Fill some pages this week with no plan to show anybody. Draw the badly proportioned thing, write the bad verse, let it be ugly. The point is the repetition, and repetition does not care whether anyone is watching.