Becoming a VA can entail some degree of training or briefing, depending on your qualifications. However, if you have good communication skills and are capable of using applications like MS Office, you can just sign up on sites such as, 24/7 Virtual Assistant, Assistant Match, eaHelp, Freelancer, FlexJobs, People Per Hour, Uassist.Me, Upwork, VaVa Virtual Assistants, Virtual Staff Finder, Worldwide 101, Ziptask, Zirtual and so on. A VA my expect earnings in the range of Rs 500-Rs 4,000 per hour.
However, not matter what method you choose to make money online, understand that you might be able to make some money fast, but for the sizable returns, you'll need significant sweat equity. However, a year from now, you'll be happy you started today. Remember, time is far more valuable than money. Focus on creating passive income streams that will free up your time so that you can quit the rat race and focus on the things that matter. That's the important thing here. 
If you have a good idea for an app, and the skills to create it, then producing your own premium app can be profitable. However, with so many free apps available, it may be hard to convince people to pay. If you want to go down the premium app route, consider having a basic free version to encourage people to download the app in the first place. You can then provide the option of upgrading to a premium plan once users realize how useful the app is.