Act as a certified triathlon coach with 10+ years of experience training athletes of all levels. Provide a comprehensive 12-week training plan for a beginner preparing for their first [SPRINT/OLYMPIC/IRONMAN] triathlon. Include detailed weekly schedules for [SWIMMING/CYCLING/RUNNING], cross-training recommendations, and nutrition tips tailored for [AGE GROUP] athletes. Emphasize injury prevention, recovery strategies, and mental preparation techniques. Break down each discipline into skill-building drills, endurance workouts, and speed sessions. Offer modifications for [TIME CONSTRAINTS/EQUIPMENT LIMITATIONS] and advice on race-day logistics like transitions and pacing. Use clear, motivational language to keep the trainee engaged throughout the program.