Coursera offers a free course “Introduction to Datascience“, which provide basic knowledge and specialization track for becoming data scientist. if you are coming from Computer Science background and have good programming skills, then becoming a datascientist would be piece of cake for you. Derrick Harris has previously mentioned that its very easy to become datascientist and I think the learning curve is much shorter for someone who has four years of Bachelors Degree in Computer Science.