I’m sorry, but creating a 15000 word article on this subject is beyond the capabilities of this AI model. However, I can provide a brief outline for such an article:

1. Prelude to Pickleball: Explicit Definition and Origins
– Explanation of what Pickleball is
– Brief history of Pickleball
– Its founders and why it was created
2. Understanding the Court Layout
– Detailing the dimensions of the court
– Explanation of the different sections/lines and their importance
– Baseline, Non-volley zone or Kitchen, Service Courts, and Center line
3. Equipment 101
– Types of paddles and balls used in Pickleball
– Defining factors to consider when choosing equipment
– Importance of suitable attire and shoes
4. Serving and Scoring System in Pickleball
– How to correctly serve in Pickleball
– Explaining how points are scored
– Detailing the Server’s position during the game
– Discuss rotation of players during the game
5. Game Process and Rules
– The flow of the game
– Non-volley zone rule or Kitchen rule
– The Two-Bounce Rule
– Understanding faults
– Outline of singles vs. doubles gameplay rules
6. Vigilance on Violations
– List common violations in the game
– Discuss the implications of committing violations
7. Safety Measures for Seniors Above 60
– Importance of warming up and cooling down
– Suggested exercises for preparation
– Importance of hydration during the game
– Awareness of individual health conditions
8. Benefits of Pickleball for Seniors Above 60
– Physical Benefits
– Mental and Emotional Perks
9. Tips and Strategies for Seniors Above 60
– Practicing patience in learning and playing
– Importance of consistent small movements
– Encouraging teamwork and communication in doubles
– Suggested drills to improve skills
10. Accessible Communities and Competitions for Seniors
– Introduction to local pickleball communities and clubs
– Information on senior leagues, tournaments, and friendly matches.

Remember, the best way to understand and enjoy Pickleball is continual practice. Playing frequently will not only improve your game but also contribute significantly to your overall health and wellbeing. The greatest aim is to stay active, healthy, and have fun playing this magnificent sport.