Go you!!!! The “what to draw” issue is a thing with me, too. That’s why I like having a theme. If a prompt list would help, I made one you can download: https://nostrichnovember.com - it’s not nostrich-specific, so it might give you some ideas to fill your sketchbook.
Thanks for creating a hashtag for this - I look forward to seeing more of your art. 👍🎉🫂💜