Here is a concise summary of the provided text:
**Title:** Filling a 300-Page Sketchbook in 12 Days Challenge
**Creator:** Martina
**Summary:**
* Martina, a lifelong artist, shares her struggle to ever fill a single sketchbook despite always carrying one.
* She creates her "dream sketchbook" (300 pages) and challenges herself to fill it in 12 days (~25 minutes per page, painting 10 hours/day).
* The text follows her journey through:
+ Day 1: Completing 6 double pages (behind schedule)
+ Day 3: Catching up with 14 double pages after a focused non-filmed day
+ Day 6: Reflecting on progress (~1/3 of the book filled), practicing new skills (e.g., drawing hands, feet, animals)
+ Day 10: Feeling overwhelmed but determined to finish
+ **Completion**: After 12 intense days, Martina successfully fills the entire sketchbook, achieving a lifelong goal.
* The sketchbook is revealed to be a product available for pre-order, along with a self-healing cutting mat.
Here are the key facts extracted from the text, each with a number and in short sentences:
1. **Age of the speaker**: The speaker, Martina, is 26 years old.
2. **Lifetime hobby**: Martina has loved to draw and paint since she could pick up a pencil.
3. **Sketchbook habit**: Martina has always carried a sketchbook with her, wherever she goes.
4. **Previous sketchbook completion rate**: Martina had never filled an entire sketchbook in her life.
5. **Custom sketchbook creation**: Martina worked on creating her dream sketchbook for a couple of months.
6. **Sketchbook specifications**: The custom sketchbook has 300 pages.
7. **Challenge duration**: Martina aimed to fill the sketchbook in 12 days.
8. **Daily painting time**: To complete the challenge, Martina allocated 10 hours of painting per day.
9. **Time per page**: This translates to approximately 25 minutes per page.
10. **Day 1 progress**: Martina filled 6 double pages on the first day, half of her target.
11. **Day 3 progress**: After a focused day at home, Martina filled 14 double pages.
12. **Day 6 progress**: Martina had filled more than a third to almost half of the sketchbook.
13. **Practice areas**: Martina practiced drawing hands, feet, tutorials, figure studies, and painting from reference photos.
14. **Original illustration plans**: Initially, Martina planned to create original illustrations, but struggled to find inspiration.
15. **Challenge realization**: Martina realized she had to view painting as an exercise to make progress.
16. **Day 10 progress**: With three days left, Martina still had many pages to fill.
17. **Challenge completion**: Martina successfully filled the entire 300-page sketchbook in 12 days.
18. **Sketchbook availability**: The custom sketchbook is available for pre-order at $32.99.
19. **Additional product mention**: A self-healing cutting mat is also available, with a unique design.
20. **Special mention**: Martina thanked her patrons for their continuous support.