If you like math, you should try yourself in Machine Learning. I recommend doing that ASAP!

If I could go back in time, I would try myself in Machine Learning 12 years ago! Right when I finished undergrad and came to the USA. After starting Andrew Ng's Machine Learning course on Coursera last month, I dropped everything except most urgent things and completed an 11 week course in just 3 weeks. The somewhat sad truth is, I first enrolled in this course many months ago, but I didn't start it then. Stars finally aligned in August and I started that course.