How much time does it take to learn / acquire the skills? 6 months is more than enough to get hands on training.
Where to acquire the skills? - Lynda - YouTube - Also, please browse for Digital Media Marketing, Google Ad Words, SEO, SEM, Facebook Marketing, Digital Strategy online certifications. Check review before buying it. Some of them are really good.
Possibilities? Endless. This is important for every organisation in today’s times. Every other organisation or independent professional is bound to have a strategist. Most of them are outsoured so you will land a project if you have a good CV.
Investment required? 0 - 1,00,000 INR. Each certification may cost you around 10,000 INR. Try to gain as much diverse skills as possible.
Amount that can be earned? People good in SEO are earning 2-4 lakhs per month sitting at their home! Some firms charge 70000 for 10 ad-words! You master the technique and you are in for money.
Hectic or not? No, not really. But you may have to spend substantial time in pondering about the strategy. With time, it will become a cake walk for you.
Notes / Suggestions Big upcoming market there in this field. Tap into it. The competition is not much if you have the skills.