People are turning to audio and visuals when it comes to technical subjects. However, you should consider doing an ebook first and turning it into an audiobook through a resource like Audible's ACX platform. You can hire a producer either through a royalty share program, so you don't have to shell out upfront cash, or you can do a pay-per-hour hire as well.

Considering that you have a finite amount of time, passive income should make up a large part of your work. And if you're serious about generating any semblance of income online, then passive income should be one of your sole goals and ambitions. Why? Simply this. Wouldn't you prefer to do the work one time and get paid repeatedly as opposed to relying on your time to generate that income?
Write and publish an eBook. You don’t need a traditional publisher and financial backing to publish your own book anymore. In fact, makes it possible for you to publish your own eBook and sell it independently – with no financial investment on your part. And with Kindle eBook publishing, your book will appear on Kindle stores worldwide within 24-48 hours. Just be prepared to market it yourself on social media, your blog, or elsewhere if you expect to generate sales.
Test websites. Remote usability testing means getting paid to navigate a website for the first time and giving feedback to the website owner. Most tests take approximately 15 minutes, and you can get paid up to $10 for each test. A test involves performing a scenario on the client’s website and recording yourself doing it. For example, you might be asked to go through the process of selecting and purchasing an item on a retailer’s website.[1]
A meta-analysis of 46 studies of telecommuting involving 12,833 employees conducted by Ravi Gajendran and David A. Harrison in the Journal of Applied Psychology, published by the American Psychological Association (APA), found that telecommuting has largely positive consequences for employees and employers.[74][75] In their meta-analytic study, Gajendran and Harrison found that telecommuting had modest but beneficial effects on employees' job satisfaction, perceived autonomy, stress levels, manager-rated job performance, and (lower) work-family conflict. Telecommuting also reduces turnover intent, or the intention to quit one’s job. Increased job satisfaction, decreased turnover intent and role stress related to telecommuting partly because of a decrease in work-family conflict. Additionally, the increase in autonomy from teleworking in turn increases job satisfaction.[citation needed] Although a number of scholars and managers[76] had previously expressed fears that employee careers might suffer and workplace relationships might be damaged because of telecommuting, the meta-analysis found that there are no generally detrimental effects on the quality of workplace relationships and career outcomes. Telecommuting actually was found to positively affect employee-supervisor relations and the relationship between job satisfaction and turnover intent was in part due to supervisor relationship quality. Only high-intensity telecommuting (where employees work from home for more than 2.5 days a week) harmed employee relationships with co-workers, even though it did reduce work-family conflict.
And while it will take time to build up a big-enough audience to attract advertisers and other ways to make extra income from your podcast, the opportunity is there. John Lee Dumas interviews entrepreneurs seven days a week for his podcast Entrepreneur on Fire and now makes more than $200,000 a month from it. In fact, John publishes all his income online and showed that he’s made almost $13 million since launching in 2012.

22. Advertising – This is definitely the most old-school way of earning money with a blog. It’s also starting to become the least common way. You can sell advertising spots directly on your site or you can sign up with a company like Google AdSense or Either way, you won’t see a whole lot of money from ads until your views are well into the thousands each day.
There is a cost to user-testing, there is also potentially a benefit. If the cost exceeds the benefit then there is actually a case for NOT doing user-testing — but I think this would be rare, but at the end of the day it should usually be a commercial decision, so there needs to be a clear commercial case made for doing it (which in most cases there is).”
Keep in mind though, you don’t need a website to do sponsored content since you can also get paid if you have a lot of social media followers. My wife has a pretty big Instagram following, and she gets all kinds of sponsorships. Not only does she get paid in cash, but we get a lot of free stuff, too. We’ve received free rugs, free lights, and free carpet cleaners. She only promotes things she loves though, so this strategy works really well for her.