I’ve tried several of these in the past few years. I hated all of them. I tried affiliate marketing with Amazon. I’m happy to promote something I use myself but hated advertising for the sake of advertising. And didn’t revive a cent even though my mentor purchased several high end products through my link. I tried Fiverr. It was ok but the only work I got was through my mentor. I went through a whole process just to get registered with Upwork and couldn’t get my profile operational. But you’re probably a lot more tech- savvy than I am. I have to say Medium suits me best. I can write what I want, when I want and earn a few bucks just having fun.