Here are a couple of pages of my sketchbook!

The first is a continuous line doodle, which I then added a few objects around - I think the page is actually quite compelling to look at, but the laxity of it means mistakes don't matter and it's great fun!

The second is similar, lots of different scenes and doodles popped into a page.

Art doesn't have to be a 'finished scene' - you can sketch, doodle, move things around, make interesting and packed pages of art and just have fun!