Like others have suggested, mainstream. Or, why don't you try utilizing the skills I'm sure you've acquired in adult to: build websites, SEO, SEM or try your hand at online consulting/remote marketing?
You could do Media Buying for a major advertiser or marketing agency in SE Asia as there's plenty of them there.
Also, if you can learn how to code (try Udemy, Coursera, Code academy, Khan Academy - all free) and you can make really good $$$ as you can charge per hour. good luck
