By Jonathan B. Miller
alpha edition, v0.5.201501151432
Last updated on 2015-01-15
It will take you far fewer than 10,000 hours. This book just gets you started on a much larger journey.
You should take as long as it takes to get through the book, but focus on doing work every day. Some people take about 3 months, others 6 months, and some only a week.