From Testing to Software Development - Carrier Change

I am a software tester who is fascinated by computers a lot. I love mobile as well as web technologies. I want to move to software development from my current testing job. I have 5 years of experience in testing. I want to ask my fellow hackers -

1. What are the chances to make this move? 2. How to do it?

as a starter, I have started learning Python (From Udacity and MIT courses). I know Java and brushing it up now a days by waking up at 5 am and coding. I know a little about Android development also. I believe that input from hacker society on hacker news will give me a direction.

Thanks, Varun