Write a structured learning path for millennial entrepreneurs to progress from self-paced online to advanced digital marketing, with the goal of analyzing case studies effectively. Use a {{tone}} tone. Cover 4 phases over 20 weeks: Foundation Building (Weeks 1-4), Skill Development (Weeks 5-10), Advanced Application (Weeks 11-16), and Mastery and Beyond (Weeks 17-20). Include a weekly schedule template and progress tracking tools. Present as numbered steps with action title, instructions, expected outcome, and pitfalls. Maximum 1800 words.