Hello dear Andrew.
What type of website do you have? For example, if you have a Health & Beauty website with some amount of visitors, you CAN earn.
First, you search related offers, you go to Affbank offers search : http://prntscr.com/gn0yzh https://affbank.com/offers
You find offer (with best Landing page, best payout and best conditions)
You Join Networks which own this offer
You start to promote it on your website (for example, you place banner on your website in related section)
You get paid in this Network.