Why do you want to know Paul?
Thinking of getting back into Adult since the retirement benefits aren't covering the med bills anymore?
Sounds like you want a step-by-step manual on what to do in Adult in 2019. Pay me as a consultant and I will go over it with you.
The info is out there it just takes a clever and DEDICATED individual to make it happen. There are about a dozen different ways to make money in Adult in 2019 but ALL of them require hard and sustained work. Depending on your skill level, age and motivation it could be a 7 days-a-week, 16 hours-a-day deal for the first year or two while you learn, fail, experiment, try again and never give up until you hit the numbers you need. That's what I did but it took me closer to four years (back in the day, '06-'09) to get a foundation of success I could build and rely on. But I knew jack shit back then and was already old(er) for such an endeavor. Today? A young buck with skill, drive and time could make it happen in about 1.5-3 years I think.
But then again, MY numbers (living in Manhattan, New York City) were/are about 5x higher than most cities/countries so factor that in as well.