there's no such a way.
Making money online requires a lot mistakes and learning. Once you figured out something that works -rinse and repeat.
I do affiliate stuff within adult niche (mostly male enhancement).
The method I use takes some money at the start and a good vendor with great commisions.
Anything over $10 per lead is more than awesome for me. First thing first I go and copy an affiliate link of adult site.
Then I go to an adult network to buy banner ads. I always use one that gives me a click for $0,04 or less.
All I do then is create campaign, load some money in -$100 is a good start, and wait for harvesting
Because I work with a very decent provisions, I only need 5 customers refered to call it a day
I usually make between $250 and $350 when I spend a hundred dollars for each campaign.
Unfortunately nothing comes free my friend