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 Elance.com, 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.
While joining affiliate programs is a free opportunity, it's a business – and like any business, it will cost some money to start and run it. But those costs will be associated with building, running and promoting your blog or website. There are many tools – free and paid - you can use to assist you with all of these processes. I list a few of my favorite affiliate marketing tools here.
Fiverr is one of the biggest providers in the gig economy on the web and you can sell a wide variety of services and products through this medium. Do the research and find out what you can offer. However, keep in mind that like any other money-making task, it takes time to succeed here. And stellar reviews will help you generate more and more income over time.
If you have pop-ups and optins on every page, I would have to think that it would be a lot harder to convince someone to link to it. Especially since the pages where you have your optins (and probably receive the most traffic) are probably the same pages that you have your best content on as well that you'd be hoping to pitch in your outreach campaign.