Don't try to learn all 400 at once. Most PDFs categorize progressions by genre or complexity. Start with the The 1-4-5 (I-IV-V): The foundation of Rock and Blues. The 2-5-1 (ii-V-I): The bread and butter of Jazz and R&B. The 1-5-6-4 (I-V-vi-IV):
You might wonder why you need so many options. Music is about subtle shifts in tension and release. A 400-progression library usually covers: